You may like an outdoor festival instead. You can get as close to or far from the stage as you like and you usually can bring your own seating. They last all day and can have multiple stages with food and vendors in between so if you get tired or overwhelmed you've got somewhere to go recover. You get exposed to a lot of bands in a short amount of time so you can get an idea of the different ways they perform and may discover music you enjoy.
Some 2 or 3 day festivals offer camping on-site and keep the music going from 12PM to 2AM. Being surrounded by music like that for days in a row lets it start to feel like a normal thing instead of the condensed experience of a concert.
When I find a clothing item I like a lot, I buy a bunch of the same item so if something happens I'll still have it. Having 5 of the same shirt means I can rotate through them so they take longer to become worn out.