Concert tips

Not sure where to post so sorry if you see it a lot but I'm going to a concert in a couple days with my best friend. I've been to one befor but it was at a much larger venue and we had seats. This one is general admission and I've never been there before. It's cold af in mn and doors open at 7 concert at 8. I don't want to have to carry a coat or stand so I was gonna come at 7-7:30. How should I carry tix and phone and money? Purse or pocket? Also what should I wear? It's for AJR (the I'm weak and sober up songs are most popular) and I'm 16.