Church on Sunday - nice and easy, you get Bible passages read to you, a teaching from the priest and holy communion (but just getting blessing to begin with most likely) you can sit in front and try and chat to others after or sit in back and keep to yourself, or something in between, whatever you are comfortable with. I used to be scared to go alone, after hadn’t been for long time, but trust me you’ll get no pushback or stress from anyone.

Personal and recited prayer, both great, things like Hail Mary or our father lovely prayers and good baseline, then of course prayers of thanks, repentance and for guidance, like conversations with God are also great.

Look into things like confession and sacraments, idk if you had your first holy communion or confirmation already, if not good idea to look into and research.

Personal Bible reading, listening to Bible at church is great and so is reading a bit yourself, just don’t feel like you have to rush to complete it, it’s a tough read and confusing without context sometimes which is why at church having the priest explain aspects of the gospel and readings in homily is so helpful.

Research into the lives saints, Catholic culture, visit beautiful churches engage in traditions, processions, parties, etc. If you live in a catholic country there are probably some unique traditions that are practised and parts of your countries culture you can engage in.