I've already tried some of mechs hinted in here... so thanks for the suggestions.
While driving in small and fast mech... it can be bit tricky to get good aim

..... but I tried anyway. I did get few shots before I got killed

It's gonna take bit longer to get in next rank from cdt if you get one or two shots at the target before you get killed. But I'm gonna keep learning.
I still have to think about boating... sniping and so on... Now it seems that boating is big no-no, it doesn't matter if you are a noob or not... but sniping seems to more acceptable now than it was in MW4.
But perhaps it's because MW4 was/is bit more arcade type of game than this. This seems to follow battletech rules more accuratly.