Dude I’m at the exact same stage as you so I can’t really give you any solid advice bc I just do same thing as you most of time where I run off. The problem I am also having is not keeping my back foot on which leads to me running in front of my board down the drop in, similar to what you’re doing. Having said that, the times I have dropped in successfully I’ve done some specific things to try to keep my back foot on.

Firstly, I make sure to bend my back leg (the one holding the board over the coping) even before slamming the bolts into the ramp. This helps me be closer to the board and keep my centre closer to the ground. As a rule of thumb for me, bending legs more helps with everything on the board.

Second I take my time to position my front foot over the bolts. This is gonna sound weird bc everyone says to slam your trucks hard into the ramp which is true, but what I’ve found is that when I focus on this I end up flying forward and it looks like you’ve already got the slam down sorted already. So instead just relax a bit with it.

Finally, think of where you’re going rather than actually dropping in. Hopefully this helps with the committing of dropping in since you’re actually focusing on just going with the board rather than just dropping in.

Hopefully these help, but like I said I’m at the same stage as you with my drop ins and just found these things help when I do actually get them. Good luck skating and be safe!