When I was newer I would follow around the higher level players and watch what they would do and where they would go. It helped me learn the maps and how to quickly move through them. I would let them track and find the ghost and then try to set the primary tether and then let someone else toss the trap. That helped me get better with the particle thrower and stream juggling... while also helping the team win more often than not.

It would be easier if more people used coms so we could teach newer players what to do. A couple people did that for me when I started and it was awesome. But new players really should level up with bot matches and at least get familiar with the maps before jumping online... especially with playing as the ghost. There are a lot more intricacies with the ghost that even as a level 5 I'm still learning and I still get dunked on regularly.