>>35144788It really depends. I'd say overall it's more an issue of your mindset of how you approach it then anything else.
It's one of the easiest competitive fightters to get into. Even if you, at most as you said, only casually play smash; provided you play it regularly and don't take a week or two break between each play session, and as long as you take your losses in stride and make an effort to examine how you could play better/look up stuff you should implement into your play, i'd say you can still absolutely get into it even if you don't play other fighting games. I only played other fighting games casually before pokken, and while i'm not, like, a top player in the competitive scene, in terms of the online matchmaking i'm high ranked and have a high winrate, so; yeah, it's possible to git gud even if you don't play fighting games.
However, if you are trying to play it purely as a casual game you bust open once every few weeks/months just for shits, then no, it's not worth it. So it comes down to if you are willing to approach it as a game you put time and effort into or not.
My advice to you would be this:
>Only try to learn a single character starting out>Learn your charactters tool's first, not long combos. By tools, I mean key moves or actions that your character has and what they are useful for. Asking around the character specific discords you can get to from discord.gg/pokken is a great help here. After you've gotten the hang of these, when to use them, and that's become muscle memory, you can worry about fancy coombos>Keep a list of the things you know you need to improve at or work into your play, but ONLY focus on 1-2 of those things at a time. That is, if you are in a match, attempt to mentally remind yourself of those 2 things, Eventually you'll find you've successfully implemented them and they've become second nature or at least easier to do, and when you feel comfortable, "switch out" those 1-2 things with another set 
