If you want to shorten the learning curve, practice, practice, practice.
I made 3 or 4 pens and knew I didn't know how to do a decent job. I took a 2x4 about 2 ft long and made a bunch of pen blanks out of it. I had ordered a bunch of tubes (didn't cost that much). My objective was not a pen or pens, but to learn and get the feel of the turning tool, turning to size, sanding and finishing. I practiced on one aspect at a time. An hour or two turning, an hour or so sanding, and much time of apply and sanding finish. My purpose was to get the feel and experience of each step, not a final pen. There was a remarkable difference between the first 3 or 4 pens versus the next ones. I think the two greatest things that came out of it was the "feel" of the tool as it cut and the finish - what to recognize in applying and sanding the finish to a smooth shine. (but I don't sand much anymore, rather turn it smooth with my tools.)