>>718429785 (OP)
Pick a game with a decently large or larger playerbase, so there are other beginner-to-intermediate players you can play against. If you try to get into a dead game you're going to only fight people who have been playing for 10+ years and will destroy you. Fighting good players will be important to improve past beginner, but if you don't know the basics it won't help you.
Play your game's tutorial, most modern FGs have at least passable tutorials though usually they struggle to impart the basics of strategy itself and focus too much on the raw mechanics. Pick a character, do that character's tutorial showing you their moves.
Go online and play some matches, even if you don't know what you're doing. If the game has any kind of matchmaking (ranked or even just a casual MR system) your opponent won't know what they're doing either. Throw out some buttons, try to anti-air when your opponent jumps etc.
Watch a couple Youtube videos about fighting game strategy, I personally strongly recommend this one as a primer for beginners
https://www.youtube.com/watch?v=riGCdE6ZPck
Play more matches, try to learn the game's recommended combos for your character but DO NOT focus too much on combos. It's better to learn how to play neutral (getting hits and not getting hit) and not getting long combos from them, than it is to know how to do long combos but never being able to do them in a real match
Ask questions, play lobby sets so you can play longer sessions against the same person (because longer sets will teach you more than shorter sets), if you're not Discordphobic see if there's a beginner hub for the game you're playing where you can get advice and sets from people of a similar skill level.
Fighting games really aren't THAT hard, but they often don't do a good job at teaching what you want to do and why, and because it's 1v1 PVP it can be hard to understand where you're going wrong. It's a community genre, so don't be afraid to ask others for help.
