The thing with Melee is if you try to main/secondary a lot of characters and try to get good with all of them, you won't really progress at the rate you want to. If you really want to get good with Falcon (Which I recommend highly), you should really drop the secondaries, at least for now. Getting really good with Falcon, or any character honestly, deserves full attention with that one character. Once you get your movement and L-Cancels crispy, you will be able to transfer that skill over with slight ease to other characters. If you focus on just one character, you will improve at a rate way faster than if you tried with 4 different ones at once.