a good way to break that fear of people judging your creative works is to do MANY projects at the same time, work a little bit on each one, so that when you submit one for review and it gets shot down, it won't hurt so bad because you'll know you have others still being prepared. you can use that feedback for your first novel to improve your other works, and therefore gain something constructive out of it even when it isn't recieved as well as you'd hoped.
so don't put all your eggs in one basket. don't throw yourself into ONE novel, make sure you've got others.
also, i know with art they say you shouldn't get to attached to it - you should be comfortable with throwing out a painting that you've been working on for 10 hours or whatever, if it's not good enough, so that you can continually improve. perhaps the same is true for writing - think about scrapping novels after they're finished (or short stories - maybe deleting an entire novel isn't a good idea!) if they're not up to standard, so you don't get too attached to them and don't associate your self worth and ability to improve with their quality. good luck anica