Not judging - well okay maybe a little.
Here’s a quick and dirty.
- delete a vertex.
- select the edge.
- This pic shows a circularization, but you might as well wait until step 5… and you should actually first -
- Subdivide it with two cuts(not one - you’ll see why later)!
- circularize it. (looptools circle, or transform/sphere and then scale to zero)
- extrude in place and scale down to give it a little edge support for smoothing. Except I didn’t do this in the pics… but you should. I did this in step 8 in a more difficult way.
- make a face - this helps the extrusion but if you are axial you don’t need to because you will…
- Extrude to the right length with two steps in between and then delete the face if there was one.
- Grid fill. Yes one step tool for a complicated process - but you have to have an even number of verts.
- Done, except I can’t sleep the sleep of the just if I don’t fix that topology (that’s why I did the 2 cut subdiv earlier, one cut generates pentagons, but two makes hexes which are easier to retopo).
- With more edge support!
- With Subdivision and smoothing.
- With a Matcap to check for smoothness.
Hm. Sorry about the disconnect between the pics and instructions… anyway, you get the idea.