Hey, check out the signature at the bottom of your posts. Apply it to yourself here. Don't throw in the towel on guitar building. You missed this shot, but if you take a break, cool down, devote your energy to something else for a while... I'm sure you'll do well again.
Seriously, your building style is one of the most distinct I have seen on this forum. You really bring something unique to guitar building. It's obvious to everyone that you have innate talent but that you also have a huge amount of LEARNED SKILL. If you quit guitarbuilding, you're basically throwing away all the time and money you invested in learning how to build. You got this far for a reason.
If you're afraid you might damage your materials, buy some cheap wood, as others have suggested. Build some basic guitars for fun. Don't spend more than you have to. (Buy cheap pickups, cheap tuners, etc.) Have fun. Build something funny or outrageous. Keep your cost low so you can sell them cheap or give them away to friends. Don't put any pressure on yourself and take your time.