1) how old are you?
2) where are you located?
GDaddy gave you excellent advice imo.
I appreciate the advice and interest. I'm not a kid, surfing since 96'.
I surfed the board as a twin fin in point waves to head high, using big futures (f8). Was blown away with how well it rides and also how solid the deck seems. Zero dents from many waves. Paddles great, turns quite well and is insanely fast. Was surprised to find it snaps in the pocket and goes off the top well. My new go to small wave board I figure. :)
XPS is a fairly incexpensive way to make a board and good shaping practice. If you use a few simple tricks you can come up with a decent, usable board.
Nice thing about XPS is that there is no significant water absorption by foam exposed to water.
Most critical is using an XPS density with a minimum compressive strength of no less than 25 psi (40-100 psi would be better). You can use some higher density foam or balsa inserts to install your fins.
Check this link:
Swaylocks Surfboard Design Forum: thoughts & theories ... practical & theoretical
RAIL PROFILE http://bgboard.blogspot.com/2014/03/march-82014-afterr-seeing-recent.html
Heed good advice.
I love this board man. I like the way you've just had a go. Sure you've made a heap of mistakes here, but that's a good way to learn. One thing's for certain, board #2 is going to be an improvement.