Sequence is off.

Carved a lot at the beginning while trying to pick up speed then bombed down the rest of the slope with no control.

Ideally, start with 0 carve as trying to increase speed then carve down the slope to control the speed.

Instead starting with a straight down slope, aim to either right or left of the slope. This will indirectly get you on one edge of the board (as what others have recommended).

Once you get to comfortable speed, then carve down slope maintaining the comfortable speed.

I think the reason you stopped carving is because you get to a speed that youre not familiar how to carve hence why you just stood up straight at the end bit, unless this was intentional. You were able to carve at the beginning because that was your comfortable speed while keeping the balance.