There's a lot of different variants, some might be easier than others

If you wanna get into it i just recommend giving it a shot with the classic microsoft solitaire collection, it'll give you a tutorial (and ads yuck) and has 5 of the most popular variants you can give a shot.
(klondike, freecell, spider, pyramid, and tripeaks)

i actually came up with my own variant too :P I'll think about putting it on reddit or something idk what to do with it- maybe just leave it actually