Newbie Asking Questions.

Hi Guys, Might Start Mining Ravencoin/Ethereum this Year and have some Question on Stuff. (Already read that Pinned post)

-Whats a Good Beginner Build for a Mining Rig?Like What Mobo should I use or Riser to buy?

-What GPU should I buy?

I heard that the best GPUs to mine are 3060 ti(?)/super(?) and 1660 ti(?)/super(?) but I can only buy the 1660 for a Reasonable Price.and For the AMD side, I found some rx580 on my local Shop but I don't know if that good or not

-How many GPU should I buy for a Good Profitability for a Beginner?

-What are these: 2miner, Minerpoolhub, ravenminer, and nanopool? and Which one is Good for Beginners?