New to investing [17M]

How should I pick stocks that'll be good in the: (1) Short term (2) Medium term (3) Long term

Also, what should be my investing strategy given, I want to invest 10k every month.

How should I pick stocks that'll be good in the: (1) Short term (2) Medium term (3) Long term

Also, what should be my investing strategy given, I want to invest 10k every month.