I just bought a 64GB iPad, anything I should know/do?

I'm not a very heavy tablet user, but generally like to have a tablet around for stuff I won't do on my phone. I bought a Pixel Tablet last year when I did my big tech upgrade (new phone, new smart watch, new upgraded tablet), but found the experience a bit lacking with the more important stuff I use my tablet for, largely taking notes with OneNote, and very light mobile gaming (which I usually use my phone for, since it's right there).

I'm curious if anybody's got any advice for a non-dedicated Apple user with an iPad. I'm already thinking about synergy with my multi-platform apps like Microsoft 365, Google Drive (free tier) and Mega (which I use as a backup repo for large data that isn't documents like games, music samples, etc).

I'm thinking some music apps would be great to take advantage of the generally lower-latency audio capabilities of the iPad, but aside from that can't think of too much. Otherwise, due to the 64GB, it's going to be my cloud-oriented low-storage tablet.

I saved $70 on a black friday deal on Amazon, so I bought a pen to go with it, which isn't the Apple Pencil and would be curious to know if I'm missing out on a ton doing that as well?

Side question: I would be curious what the third-party app world is like as well, ideally something like iOS F-Droid.