It's . You know what that means. It's the best day to learn how to play fighting games! You're not bad at learning them. Fighting games are terrible at teaching you how to play them. It's the only genre of video game that requires you to do homework before you can even start playing and the homework is not even included in the game!
If you want a Beginner game I recommend Tough Love Arena and FOOTSIES. Tough Love Arena is a FREE game that you can play right now on your browser or phone. FOOTSIES is a very simple game that teaches you the fundamentals and can also be played on your phone.
If you want an Easy game I recommend Granblue Fantasy: Versus. Granblue Fantasy: Versus is a grounded game with simple controls that is easy to learn but has plenty of things to master.
If you want a Medium game I recommend the Marvel vs. Capcom series. Marvel vs. Capcom will teach you team mechanics and how to create complex combos.
If you want a Hard game I recommend Tekken 7. Tekken 7 will teach you the fundamentals of 3D games.