I might limit to once a day, but if there are Positive Indicators in the air, sure, why not.
By morning time it's just that the expansion might cause quite the bulge.

Usually guys have done pumping once a day, following the
5x5x3 routine.
As long as you're feeling comfortable, I'd say fine. Just don't push too much too fast, I don't want you to hit plateau right away. You can always add more intensity if you feel like you've plateaud.
It is possible to overtrain! Anyway, loving your enthusiastic nature, don't give up on that, keep on gaining!