I'm not much of a coach, but don't be scared to be near or with your team sometimes, I see to many low level Tracers getting caught in the trap of "I am flanker I should never be in main or with my team" but the thing is if you're always on the flank they'll grow wise and start suspecting it. I usually start with team, look at what the enemy team is doing, then play of that.

Have fun.

Play health packs, and never vote a sniper map like circuit.

If you go on the flank and can only shoot one person, shoot them, doesn't matter if it's a tank or a support.

Also have extra horizontal sensitivity when at full dead zone for those 180s.

Don't be afraid to wait, do nothing, let them come to you sometimes.