beginner needs a little help pls

Hey there, just made it to maps. playing kinetic fusillade and its pretty solid. but now i need currency and maps.

1. what should i do first to get a few chaos to upgrade my gear?

2. is there an atlas tree is should follow to get currency or maps faster?

3. when it comes to the league mechanic, is there some wish i should look for? or what is good to take? how can i progess i this mechanic? i have found 4 coins of restoration...what do i do with this?

4. general tips to progress faster or easier?

THANKS!