To my knowledge you can't change your name.
If you're still relatively new, perhaps you could email members@worldgolftour.com and ask them to let you restart.
If you've been here awhile, I think they will tell you 'no'... simply because it wouldn't be fair to other hacks if you were to take pro skills (or whatever your tier) and put them on the hack tees.
Hope this helps. Best of luck.
**edit.. i see you're a brand new player.... I would write to WGT and ask them if you could change. Couldn't hurt to ask.