I think it's okay for ISO to put 800. It must be put on the shelf.
The aperture is preferably around 5.6, and can be adjusted to 2.8 in low light.
I have 24- 105 70-200 albums in Baidu space, which are stage and wedding low-light shooting respectively.
You can refer to it and hope to bring you some help.
You can communicate at any time if you have any questions.