>>95855560
https://www.mtggoldfish.com/metagame/pauper/full#paper
This is the common only format, play it, you got a wide variety of decks across all colors and it's fairly cheap, you'll find many viable combo and control decks just in that list alone, there's some less played ones that are really good just slow, so they don't have an high meta share on mtgo, like mono black gardens or UB control or jeskai epehemerate as control decks, it's also a fairly competitive format with the next large event taking place in Italy with a 1200 player cap on july 6-7.
If you want to just try out the formats I'd recommend looking up on Xmage for a completely free platform where you can play anything you want.