I don’t know much about camera gear at all but I would love to know what equipment is a much have!
I would love to record concerts and indoor activities.
It would be much appreciated if someone could provide me with some insight on cameras, lighting etc.
Depends on your budget. I’ve been looking at a Panasonic G7. Sony and Panasonic both make boss mirrorless cameras that you might want to check out from around $1k-$2k
I’d second @Ferman 's recommendation of a G7, or any of the Panny m4/3 cameras. However, depending on what concerts you want to record, you may need to ditch the interchangable lens format. I know some venues/concerts allow cameras, but only if they are ‘non-professional’ fixed lens cameras. Having said that, most security guards are aware of the bigger Canon/Nikon cameras, so sometimes you can get away with a smaller m4/3 camera without them noticing. What other ‘indoor activities’ are you wanting to shoot? If it’s a lot of low-light stuff, one of the Sony’s with a full-frame sensor would be best, but they are quite expensive. Micro 4/3, while I love it, does struggle a bit in low-light situations.
I got my G7 when it was $500 on Amazon - which was a steal. Would recommend as well.
Audio-recording capabilities should be a priority, as well as lighting for the subject.
Please give us your budget.