Press F2:
Play 2'0* to 2'5* Easy.
Play 2'5* to 2'9* Doubletime. Get S 97%+
Play 3'5* to 3'9* Nomod/Hidden. Get S 99%+
4'0* to 4'3* Hardrock. Get 91%+
4'4* to 4'9* Nomod. Get S 98%+
5'0* to 5'3* Nomod Get 93%+
5'5* to 5'9* Nofail. Try get at least 85%+
6'3* to 6'8* Halftime. Try to the map.
6'8* to 7'5* Don't touch.
7'5* to 8'0* Don't touch.
8'0* to 8'2* Don't touch.
8'2*+ Don't touch.
If you can't complete the goal from one of those just skip it and focus on the ones you can complete until your skills are ready for that.
After play for a while like this you can move all the mods and acc goals one place down.
Obviously each map is different and star ratting isn't a good way to evaluate a map, but this is made thinking on the average diff of the maps.You training everything like this, so when you get more time playing you have skills to get into what you want to play.
Don't retry never. If you want replay the map after finish the map.