Piracetam is a good place to start. Its the cheapest of the racetams but you should invest in a choline source along with it. Aniracetam was slightly better but I didn't like how its fat soluble. I got pretty good results from oxiracetam and will cycle between that and piracetam depending on what I'm doing that day. For now I'm going to try the noopept out for a little bit.
Also l-theanine isn't really a nootropic but when paired with caffeine it will help with reaction time, improves mood, improves sleep if you have ADHD and may boost the immune system. I personally find myself in really good moods, singing to myself when I normally wouldn't and more at peace.