I was raised with revolvers as "old faithful"....I carry a S&W UL 38, NAA .22LR 5 shot mini wheel around the house and if I'm out and about I drag along that 3rd wheel, a H&K P7 9mm...
My revolver is my first self defense choice, 6 years with the current one and only 1 misfire....that's pretty good. The H&K has never jammed and it's my favorite to shoot of all I've ever shot. Even being made in the 80's, it's still one of the best semis I've ever shot, not a small gun but still concealable....most times I just wear it open, doesn't bother me....
When training, I recommend folks utilize the "try before you buy" method and ask their friends to shoot theirs, test feel at retail stores and ask around. For Newbies I do recommend beginning with a revolver, then move onto semis when they're ready, if they'd like.
I also recommend laser grips if $$ possible, I think it's a great training aid to help illustrate and minimize arc of movement while dry firing & practicing. I'm also blind as a bat and "see" the laser being a useful aid in a low visibility setting. My S&W has factory Crimsons and I demonstrate it during training but am quick to reinforce the point the laser never replaces practice and continued skill development.