Mitsuru newb combo help

first of all i’m not great at fighting games in general.

i’m having trouble getting the timing for Mitsuru’s challenge 19 consistently. it’s mainly the AAA>B part of the combo that i can only get to work like maybe a 3rd of the time. i’ve tried different rhythms, A A A B, AAA B, AAAB, and it seems like A A A B works most often, but even that feels pretty random.

do you guys have any tips? what should the rhythm be like ?

like when i first learned Ryu’s basic, jab jab, duck forward kick link, my friend kept saying, “don’t kick so early” and then eventually i learned i needed to just slow down and it kind of opened up my game.