Unless you are flush with cash I wouldn't go and pay for lessons, but maybe just some extra practice on the clays and you should find it all comes together, and everyone that does clays likes nothing more than to point out where you are going wrong and what you should be doing lol!
We were all like you when we started out, so don't beat yourself up about it you will find it suddenly clicks into place and you will be hitting nearly all of them. Good luck fella.