Low jabs into heavy uppercut

I can’t do it. Been trying for weeks but nothing.

I was wondering if there is some kind of shortcut or some kind of trick do reliably do it. I got problems inputting the DP motion after the last low jab, often Hadoken comes out instead of Shoryuken.

There is an input shortcut for DP that you can use: :df: :d: :df: + :hp:
this way you can avoid having to input forward and getting a hadoken.
But above all else:

P R A C T I C E
R
A
C
T
I
C
E

Yeah true that shortcut helped me a lot, now I can do it way more reliably.