you can always ask questions here, we will all help you.

Geometry consists of many theroms and postulates that you will have to remember to be able to solve problems.

for me when i started geometry it was very difficult at first, but after you actually study hard, it wont be so difficult anymore.

to answer your question about a protractor, i never used one but you will need to draw things like triangle, squares, rectangle, trapeziods ect.. and if you have questions about proofs or anything in geometry, just ask.