-You seem to trace your line even if you miss the mark you wanted to make never try to make another line over it leave it as is.

-Ellipses should be drawn over for at least 2 or 3 times yours seems more than that.

-Your lines are a little wobbly and arch but that will be made correct with practice.

-Try to place dots then ghost the lines and don't rush the process especially in rough perspective.

That's all hope this was enough.