Advice for someone new to religion?

I have recently started to think more about religion and God. Growing up, I was raised to be an atheist. However I’ve always been unsure of what I believe and for a while now I’ve been educating myself on Christianity. I think it is a beautiful religion and have been reading parts of the bible for a few weeks.

One question I have is – what’s the difference between Christianity and Catholicism?

Any advice on how to educate myself more would be very appreciated, including tips/info on praying, getting closer to God, etc.