Congrats on getting into the hobby. With some quality insruction, you'll have your airplane doing exactly what you want soon.
One thing you mentioned is that you added nose weight to bring the CG forward. You shouldn't add weight to adjust the CG if you can do it another way. Moving your battery forward is a common way to handle a CG problem, and some flyers go so far as to move the reciever too. Good luck on learning. Do you have an instructor yet?