I screwed up on the first crate. I memorised the message instead of writing it down and i didnt judge the distance on the map so i overshot the target area. Thats where i lost 30min as i had to track back to base to get the mission again. I learned how to heal people propperly and how to use the medic system that was the other upset for me other than that following the orders was easy and once i got the map marking was easy to get used to. I pre plotted all the marks on the map as i got them and used the Compass on the map to judge direction which speed things up quite a bit.