How do Marth's use aerial so quickly?

[Evanpwnz]

Recently I have been playing alot of Marth ditos and have been getting scrapped. The difference I notice between the other Marths and I is that they chain their aerials (fair/uair) in one consecutive jump/combo (combos like fair into uair in one short hop or fair into multiple fairs.) so quickly while I would fast fall/L-cancel aerials and missing the follow ups. Everytime I would try chaining my aerials I would get punished/counter by their aerials mostly due to me being too slow with the aerials and messing up my spacing. I want to see if I'm doing something wrong with my positioning or if there's something I have to do with my buttons to be quick enough. For nair and fair I use the A button and dair/uair I use the c stick. I tried messing around in training mode with aerials by switching buttons but I still seem to have trouble being quick enough to aerial multiple times in one jump. Any suggestions/help?

Edit: I just noticed how bad the grammar is for the title so forgive me.

 

[AirFair]

There is short hop double fair and short hop fair-uair. You just have to grind those out, as it's all one movement. I jump with so I go straight to the c stick when going left. When going right, I use for the first aerial, then c stick for the next. It's difficult, but it gets easier with practice.

 

[Evanpwnz]

There is short hop double fair and short hop fair-uair. You just have to grind those out, as it's all one movement. I jump with so I go straight to the c stick when going left. When going right, I use for the first aerial, then c stick for the next. It's difficult, but it gets easier with practice.

Can I do these moves with the Y button as jump, I find it hard to adjust changing jump buttons -_-.

 

[AirFair]

Yeah of course. Just get used to using the c stick and or A button right after. Whichever makes it more comfortable. Just make sure you can L cancel after the second aerial.