First off, thank you and welcome to the game. This post is really a place for you guys to Q&A with the game designers. Questions on features, campaigns or scenarios can go here and we will try to get to them to help you out.
So if you are new to the CM you probably want to start easy and small to get the feel for the game. Check the scenario notes as designers often will highlight which side may be easy or harder. For example, "Valley of Ashes" is by-design, pretty easy for the Blue
Well, they are under the sight from the hill and are getting hit by artillery and air in the second mission, but I can agree - it was not hard, especially when my ATGM BRDM performed a true miracle, cured itself from blindness and killed some tanks on the hill. Apart from this incident my ATGMs remain loyal to total darkness and can't see even the enemy found by their team spotters hour ago.
I really see no options to clear the enemies from the hill in the third mission, since my artiller