what you could do is make one pattern with the kick, then one pattern with the kick and snare, then one pattern with the kick, snare and hit-hat and keep going like that. You can then switch between patterns and they'll play in time
No worries you don't have to delete the full track, you can delete individual hits. You just need to play the pattern, have delete selected and press the pad that you want deleted at that specific time. It's quite cool the sequencer, when you get to grips with it