If you mean warmup, in the ideal session I would start out with nm1 type maps (aim consistency with bursts/short streams), then move on to aim skillcap with wide/fast jumps for my skill level, then I start playing low bpm long stream maps and then higher bpm stream maps and speed/fast burst maps and then play hybrid fast aim/speed maps to push overall skillcap and by then you should be able to mechanically do most things.
Although, I usually don't actually do this and I normally just open osu and play whatever the hell I want with no regard to anything.
The gist though is that you want to start out with the aim consistency maps and the low bpm stream maps before you move on to the faster aim maps and higher bpm stream maps so that you don't injure yourself.