actually youre supposed to use a subaru specific cam gear wrench. i think perrin sells one but a friend of mine is a subie mechanic so i lucked out and got to use his.
wrinkleboi no real pointers just have to be gentle with it. my problem was the bolt was so tight when i got a grip on it with some pliers i started to chip off parts of the gear with the wrench i was using to hold it. i had to cut the bolt and fold the washer part up to release the pressure. it was finger tight at that point. hope this doesnt happen to you. good luck man.