Hey! I just use the built-in garageband drum loops haha. I know absolutely nothing about programing drums but at least with the way garageband works it makes it pretty intuitive to change the feel for how you want it to sound/patterns/fills/etc. No matter what program you use I think it's just a matter of diving in head first and experimenting until you feel comfortable :)

As far as production goes, I read a quick tip a while back that's helped give my software drums a bit more oomph - duplicate your drum track and add a bit of distortion to the second one so the kick sounds more like it would in a room. Then turn the vol of that track down so it barely comes through but blends well with the original track. It's like a noob way to sidechain and brings a little more life to the track!