Ok, I am just starting out with this stuff and I have a question. If you have tried many spells and nothing has happened for all of them, what is the problem? I can't seem to do anything right and I don't know why.
Some spells take time to come into full effect. Keep practicing, keep working and expanding on your basics, and keep faith. Make sure you're in the best mindset and are functioning on a good vibrational level when you're doing your work. But if it's stuff like changing your eye color, DNA, fluff stuff, etc. then they are just never ever ever going to work.
Maybe you could specify what spells you used and how you went about doing them, so some of us could possible point out what you did wrong, if you did anything wrong, or maybe add some things to the spell to help it, or give some advise on things that help us? There are so many pagans on this site, I'm sure someone could figure out what went wrong. But patgabz could be right too, you may just need more practice or the spells just haven't had enough time to take effect.