Hey! I’ve been trying lately to get rid of big platforms from my life. One part of it is that I usually buy ebooks/audiobooks from apple, Amazon or google, however I’m then also forced to use their reading app, which is a vendor lock-in I’m not comfortable with.

I know there are plenty of ebook readers out there, but I’m trying to find

1. A store where I can buy ebooks that can be opened in a ebook reader of my choice.
2. A way to then sync my progress between phone and laptop. I have nextcloud setup, so if I can make use of that then it’s perfect.

Anyone here got any tips?

For most of my life, I've been a hobbyist programmer. From Qbasic to Python and JavaScript. I've always wanted to create an Android app, really just for me, just to do it. It's a bucket list thing.

Can you give me a book or a website guide that is up to date and complete but not 100,000 pages long that could help me get it done? A book would be preferred! I just want to cross this off my list!