Viking,
Welcome! I am new to Penis Enlargement myself, at least in actually getting serious about it, and am small myself.
I started at 5.25 BPenis EnlargementL also. Most here would say to use the "newbie routine" to get started and to condition your penis. And that is probably very good advice.
If you start looking around this site you will find that it has more information than any other Penis Enlargement site (at least any that I have come across in about ten years of intermittent curiosity and dabbling in Penis Enlargement). There are some incredibly helpful long-time vets around here with a wealth of knowledge and experience if you get stuck or need advice.
Regarding losing gains. I have not seen much of that from the long time members here and I have not seen it in any relevant studies on Penis Enlargement either. (the few studies related to [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]traction[/words] and such) I don't think that these supposed or anecdotal losses that are sometime reported are anything significant or surprising. Sure if you take any body modification such as weightlifting, one can experience some loss if you suddenly stop, but if one has spent considerable time working out they definitely won't lose all of their muscle mass. Or if you take a disc out of the lip of one of those tribal people, their lip won't ever return to normal again
In other words, if you have developed new tissue over time, actually changed the structure of your body in some way, "it" doesn't "remember" what it was, it simply keeps recreating what it is. There would have to actually be a reason for it to atrophy or change or "shrink" or whatever. A cell doesn't know that it was created by Penis Enlargement, so when it comes time to replicate, there is no process that says, no more Penis Enlargement going on anymore, don't replace the "new" Penis Enlargement cells.
You body simply keeps recreating what it is over and over again. It becomes part of your DNA, actually RNA in this case I think. Sorry, I ramble a lot
Anyway, ask a real vet about this "shrinking" thing you are worried about. I don't think that someone can lose say 2-4" of penis by stopping Penis Enlargement. Only very short term gains can be lost from what I have read, so if you are in it for the long-haul, I wouldn't give it a second thought.
As to being skeptical about Penis Enlargement in general. You would probably be insane if you weren't. The mainstream consensus is that Penis Enlargement is either fantasy or dangerous. However with some of the "traction" studies done by urologists that are becoming more numerous, that view may be starting to change slowly. As you learn more and more about the stories and techniques around here, and some of the science and studies peripherally around "Penis Enlargement" here and elsewhere, you should come to realize that this is all rather real, albeit outside of the mainstream. Either that, or you will see some vast conspiracy of unconnected people trying to pull your leg for some unknown motive.
LOL
Like any other endeavor, if you are going to succeed, you will need to be committed and positive. Otherwise, you will not do what is necessary. It is just human nature. Don't expect any "miracles" as this will just set you up for disappointment. Set your initial goals very modestly and your long term goals very liberally. You want to always have success and FUN in the Penis Enlargement journey that you will be on. By setting very modest short term goals, you will be able to have success far more easily. And success, no matter how small, breed further success and commitment. Make it fun! If it is a chore, or is not interesting for you, you will most likely quit before you receive the rewards of your efforts. For me personally, I have to make my Penis Enlargement journey more about learning, self-discovery, and experimentation. That is what makes it fun and interesting to me. That is what will drive me to continue even if I am not getting whatever "results" that I am looking for at any given time. For others, it might be a different perspective. It does not matter what the perspective is, so long as it is one that will propel you forward in your journey. Look at any of the big gainers, and you will see a passion, obsession(?), and enjoyment of the PROCESS of doing Penis Enlargement rather than a focus only on results. For me, Penis Enlargement has taken on the role of a form of entertainment. I enjoy doing it, reading about it, thinking about it, that is what will drive me to success, without being focused on short term gains, losses, or plateaus. With that mindset, even a "set-back" is merely something learned, and thus gained.
I talk too much!
Anyway, I am a small guy, I have a progress thread if you wish to see a tiny guy's approach to Penis Enlargement, if you need to see someone who isn't already big going through this journey. I wish you well. There is much to learn, experience, and enjoy in the world of Penis Enlargement, not just in terms of your penis, but as a person as well.
Tom