It really will get easier, I promise! When I first started to crochet, it took me weeks of getting nowhere, and I gave up on it! Made me pretty mad, not being able to figure it out, so after a couple weeks of pouting about it, the hook and yarn came out once again! I eventually got it down right, and you will to! Don't give up, just keep practicing and you'll get it!
You may want to experiment with different hooks,because for me, there is a difference.Like Eva said in her reply, the yarn should be able to slide easily. From a personal perspective, I am unable to use bamboo or plastic hooks to achieve that. For me, I need an aluminum hook. Maybe that will help you to.
Paula