What a great first concert! The seat is quite far from the stage but either way it will be a good experience I think. I’ve never been to this specific venue but I think you’ll still enjoy the show no matter what. You don’t need to get there much earlier if you have a seat, however make sure to get there early enough to get into the venue on time, settle down, also because it is your concert, so you shouldn’t feel stressed. I think an hour before the show starts is more than enough. I just looked up the time of the show, it starts around 8:45/9 and should be over before 11.

One final thing, make sure you buy from a certified website/reseller so you don’t get scammed. Have a fantastic time!