Little to add, but that's rarely stopped me. . .
I have a "rule": if you have to ask which you should get, a .38 or a .357, the answer is a .38. Like any other rule, I'm sure there are exceptions, but the .38 has served well for experts AND for novices, whereas the .357 is less forgiving for a relatively new shooter.
Of course, the .357 can handle both, but the people who thrive with full-house .357 shooting are relative experts who devote lots of time to mastering that combination. The more occasional shooter is almost certain to find it easier to hit accurately and rapidly with a .38, and will wind up shooting .38s out of his .357 anyway.
Before going into the Army, I shot tons of .22 pistol and occasionally got to shoot some centerfire. I quickly got comfortable with the .45 Automatic. I then bought a Mod 66 .357 4" and found that gun's flash and blast rather punishing at the indoor range with 158g LSWC, 170g IMI FMJ. The 125g JHP had a flash & blast that were unreal. Yes, I learned to shoot it pretty well, but I achieved speed & accuracy with the .38 and .45 that I never equalled with the .357.
Guess what I carry & have by the bedside and in my car, my wife's car, and my daughter's car? Yessir, .38's. Recently acquired a nice 1911 that will play a role once I replace the factory mag, which always jams on the third-to-last round. My 38s all go bang every time I pull the trigger. I don't own any 357s these days.