Its been a while and need some guidance

I haven’t played this game in a few years but now I am out of work for a few weeks for medical reasons and want to jump back on.

What’s with these new contracts? I’m AA? How do I get more CS per contract? Always says low for teamwork? What is the best way to get that up? Usually I am getting 7-8q/hr and I’m generally the leader by far in the contracts. It seems hard to be able to get the PE reward? Also how long is the winter season and how many contracts will there be?