Good luck guys, I recently had the same situation in the SCOOP. My best advice has kind of already been said, but I'm gonna jabber a bit anyway!
There are def plenty of similar level players playing, but there are also plenty of better players too. The main thing I found, especially if the structure is slower than you usually play, is that there will be more small pots played relative to stack size. You're way less likely to easily double up when you hit your monster, so don't get put off by that if your AA only wins 1 call then a fold on the flop etc.....
Overall, play your best solid game, wait for great cards, and great spots and be patient.
I was rubbish, then unlucky in equal measure. Actually it was more like pocket pair vs AK, 52% rubbish, and 48% unlucky.....or Brexit maybe.....I gifted a load of chips continuing a semi bluff, then got AA cracked when shortish Wishing you guys better luck and also a much more solid game than I offered on the day!
On studying, I wouldn't study for a particular tourney, its not the game to introduce new ideas. Focus on the best game you already have, and stick to what you know.
Hope you guys smash it!