Some ideas about photography, please ask.

Automatic gear is not very easy to use, I suggest you use P gear, add flash and adjust the sensitivity!

Indoor, you use sensitivity 400, add flash, outdoor reduce sensitivity, turn off flash!

To give priority to snapshot action, you can use sports mode or shutter priority, but ISO depends on the situation.

It is best not to use high ISO, but also consider the adjustment range of your aperture. ...

I don't know what level camera it is. If a good camera is above the professional level, it will be much easier.