Hello and welcome to the forums ! Nice work.
I wanted to say ( since you're new to art ) that the longer and larger strokes ( i.e. long straight lines, or larger circles, etc. ) can be best made by moving the whole arm instead of the hand ( while locking your hand and pencil in place -- I know I'm in no real position to teach yet, but I just wanted to take a few minutes from my day and help out ).
I look forward to seeing your future progress, good luck on your Art School journey !