sounds like the main problem is programming drums? I wouldn't worry too much about the actual samples, you can change them after, just get used to drawing in the patterns. On Cubase you get a big grid with a keyboard down the left. When you press a key, it activates a drum sample. You figure out which key is which drum, and draw in one measure of the beat. Then just copy paste that until it's long enough
I normally come up with a beat, repeat it for 5 minutes, record bass along to it, then when I have a bassline I like, I'll cut it up using the snap tool so that it's always in time with the beat, and move it so that it repeats just 4 or 8 times for a verse. Then I would hopefully come up with another part to go with it. This will have the same tempo so I'll record it to the same beat, but then go back after and change the beat for this section of the song etc etc
No idea if this is any help, I guess everyone does things differently