Using tournaments mappool and download from there. Some stuff you should know are:
NM1 Aim Consistency
NM2 Streams
NM3 Alternating
NM4 Tech
NM5 Speed
NM6 Miscellaneous
HD1 Reading Consistency
HD2 Low AR Reading
HD3 Miscellaneous
HR1 Aim Consistency
HR2 Precision Aim
HR3 Miscellaneous
DT1 Aim Consistency
DT2 Stamina Speed
DT3 Fast Speed
DT4 Miscellaneous
FM1 Aim Focused
FM2 Antimod
FM3 Miscellaneous
TB Balanced Marathon
Download some maps and practice your skillsets!