It seems like for the left one you got a good shape. I've seen a lot of early pens including mine where there was a sort of a fear of turning off all the wood and the pen is thick with rounded ends to meet the hardware.
You can be proud of those as first pens . On the first one , the upper barrel is perfect to my eyes but the lower barrel would be a bit better if it were a hair fatter , like the upper barrel . I would guess the center of the upper barrel to be 5-10 thou greater diameter than the center band or clip end . That is the range I target for . Of the other two , I prefer the top one for the same reasons .
I think you did a fantastic job. Unlike the other comments, I prefer more of a curve or a very slight bevel rather than a taper like you have on the first pen, but that’s strictly a personal preference and nothing more. You did a fine job, they’re far better than my first few pens which had the dreaded “wasp” look. I’m sure we’ll be seeing more great work from you soon enough.