If you've done a clutch on a two wheel drive vehicle, it's not that bad. You've got two drivelines instead of one, and the transmission/transfer case is heavy and awkward to balance on a floor jack. It would be easier if you had a transmission jack or take the transfer case off first, then the transmission.
If you've never done a clutch before there are a lot of steps involved that really can be challenging for a beginner. U-joints, exhaust, linkages, changing the pilot bearing/bushing, using torque wrenches, not getting greasy fingerprints on the clutch surfaces, etc.,etc. I don't want to discourage you, but it might take several days to finish the task. But with the amount of money that some shops charge, it might be worth your trouble. good luck, john