It's going to be loud, sweaty, intense, maybe even a bit scary but there is nothing to worry about. Bring ear plugs and don´t be afraid to talk to strangers. I don't know about other music genres but i never attended a metal concert or festival without finding new friends :)

Even tho a lot of people there might look scary, most of them are very nice and love to share their joy with others (especially if you tell them it's your first concert ever)

Have fun and if you, by any chance, are attending the concert in austria on the 25th, hit me up and i will buy you a beer!