If you live like an hour (ie reasonable travel time from the tourn) then its a good idea to just go there to know the layout of the casino.
Know where the tourn section is from the cash games, where to register, etc. That will get rid of a lot of issues with most people have playing live for the 1st time. I would tell you to at least get there an hour probably 2 hours early and get used to the casino if you have never been there. Just be nice and respectful to people and it will be ok, lol.
Seat numbers are from a dealers left side as they stand and deal and go clockwise. So seat 1 is on the dealers left hand side then 2 and three with 5 near in the middle of the table. The table max seat is on the right of the dealer.
I was never a live tourn player. I always played live cash games years ago but I do remember playing in a weekend/daily tourn at the local casino and the entry was for a few hundred dollars. I thought the players would know what they're doing for that entry price.
WOW, was I so wrong, lol. First 5 hands we had people going bust on the silliest hands/bluffs that made absolutely zero sense at the beginning stages of the tourn. I mean they would have a pair of tens and the flop is all paint and they go all in with like 50-100BBs or more, with almost nothing in the pot lol crazy beginner, online freeroll Mickey Mouse nonsense. And it wasn't a rebuy tourn, lol.
My point is, don't think of the entry price as a level of who you're going to play. Hopefully you have enough knowledge to sit there and judge someone's game so you can tell who is serious and someone that doesn't know the game well.
Just show up well rested and have fun.
GL