Are you nuts - no!
Would I recommend it - no!
Have I done stuff like that myself - er..
!
It’s very easy to get all holyer than thou about these things. My view is that you were P1, you were solo and your arse was in the seat. You broke no rules and you learned from the experience - I admire your spirit of adventure.
May I remind everyone that Neil Williams taught himself aeros and his accounts of his first aerobatic flights are inspiring reading indeed.
Sure, now get some training and learn properly. But its not everyday you do something that you can tell the grandkids about - good on you.
Kingy