@ShadyHeart
I take it you never got into Smash Melee. It has two attack buttons. Simple. Until you want to learn things like Shffl-ing. I would suggest you find that game and practice that. Its the hardest easy thing in any fighting game I reckon. It will make all combos and buttons much easier when you have learned how to do it. And it will carry over to any fighting game you pick up on in the future. Good foundations make it easy to learn anything. Well, easier.
haha, that's honestly terrible advice and completely incorrect. pretty much none of the smash execution carries over to fighting games. i've got a couple of friends i've tried to convert who are top 10 smashers in my country (they travel/attend dreamhack, for instance.) they are good at smash but their execution in fighting games is pretty bad.
smash inputs are inherently vastly different from the ones in games such as sf4, kof or guilty gear. in smash, you'll often see people mention someone's "tech skill," then proceed to mention his APM as evidence of it. that is *not* a thing when it comes to fighting games. in smash a lot of things are simply about making inputs in a particular order at high speed, while precision or accuracy (such as always needing an X frame gap between inputs, having stick direction in one place on frame Y, but then switching the position as you hit a button on frame Z.) in smash it's more about speed, and less about precise execution. i personally believe this difference is why every single smasher i've faced in 2d fighters also happen to be mashers galore. they just can't stop hitting buttons.
if you want to give people advice for an actual fighting game with execution skills that translate to all other fighters, you should be telling them to play guilty gear (which is by far and away the best/highest skill ceiling fighter currently active. at least in terms of mechanics, design and depth.)