>>2844593You got the new STM one or the old one? Because the old one will QUICKLY limit you as soon as you get better and better at taking photos. Focus is way too slow to keep up with what you need for concerts.
>>2844383Use the 18-55 at 18 with as long as a shutter speed you can manage before blurring everything to shit
do not be afraid to pump up the ISO to the limits of your sensor if necessary
be prepared to decide if everything needs to be in B&W (if the lights are too shitty for example, if everything is pure red and blue you're fucked, go B&W. Don't mix colours and bw, try one OR the other.)
If you can't get a somewhat level angle to the people playing, raise your camera and focus with live view.
If there are lasers, don't live view or you run a good chance of throwing your camera away, but it doesn't look like this will be a case of lasers.