I got a used kit years ago and included cymbals and seat. What I didn't know, that now I'm glad about, is that the heads weren't too bad. I haven't changed them yet, but it looks like a big pain to do it, a lot more than changing strings....
It takes time for sure, and it can drive you nuts trying to figure it out, but you can only go so fast, it has to be part of you over time, and all the stuff that seems impossible starts to just happen.
Then one day, you sit there, run thru different beats, and tempos and dynamics and 45 minutes go by and you think it was like, 10 and you're all heated up and had to take off your fleece if it's winter and you feel like you worked out a bit and it's awesome.
Then one day you go jam somewhere and you sit in and someone thinks you're actually a drummer! That day will blow your mind. It did for me - the Jamfest! (2004) Then you'll really start playing, buying books, dvd's, metronome and pad and start to read....
Then you'll try to play on a jam on your multi-track and it won't sound like total crap and it will be coooool. check out mine, not great, not a song, but some jams. See link.
Good luck, have a blast!