Is there any hope for a potential new seller doing Ra?

I have been researching into being an Amazon seller for several months now. As a beginner with almost no money to invest up front I loved the retail arbitrage model as on a smaller scale I did pretty well flipping things on Mercari for a few years until their shipping fees made it to where buyers don’t use the app anymore.

I want to make it clear that while I didn’t believe this would be an easy business at all, I didn’t think it would feel as impossible as it currently does. I haven’t listed a single thing as anything I scan or look up says “requires approval”. And the approval process for almost anything I look at requires things I can’t provide.

Still motivated I did more research, and some videos suggested starting with used books as they’re less likely to require approval. I went to my local thrift store and spent an hour scanning literally every single book. EVERYTHING said it required approval. Everything.

I want to know if this is at all worth my time, or if retail arbitrage is 1)an overly saturated market, 2)too risky due to how easy it seems to be to be hit with violations.

Also I ask please be kind in your replies. I have dyscalculia and learning new things is difficult for me—I certainly can learn them, it just takes me much longer. I did search this subreddit which is why I learned this is kind of a tough business and not at all as beginner friendly as I thought it might be. I’ve researched and read stuff and watched videos and lurked here and read. It’s been months and I still haven’t gotten anywhere.

I just want an honest answer on if this is actually a profitable business model anymore, or if there’s another beginner friendly way to sell on Amazon, or if I should instead just look at selling on another platform like eBay.

Thanks in advance.