Too early or too late

I am 19 turning 20 in April I have a baby boy who is currently 9 months and will be turning 1 in May.

I am thinking of baby #2 and when it be the best

Im thinking now isn’t as bad and i can get over with them growing up together.

But also i feel guilty about splitting the attention and a lot more things. I feel like 4/5 year gap is t bad as my first would be more independent and vocal about most things also more mature.

So by that time i would be 24/25 but then I’m thinking want one more (3kids in total) and cant wait another 4/5 yrs until I hit 30

I know this may not make sense but when do you thinks its best for my age to start planning again