Advice for New eBay Seller

I'm a avid eBay buyer, usually 360 games and computer parts and was looking into getting into selling some of my stuff on eBay since I get low balled all the time on FB market. I don't plan on making it my job, just to get some cash for stuff I don't need

So my question is where do I start? Is there any books, YouTubers, resources i should look into?