There is NO WAY you can totally ruin a blank. Unless you break it.
But, that's not going to happen!!
You may build an Orvis, hand crafted bamboo, Sage, Winston, Batson, H&H, Tiger Eye or anything else. The key to building is to go slow. Step away if you get frustrated (not for very long ... just a short time out!). Practice before you wrap. Anything put on before the finish can be removed and redone.