If they get too close, then move away from them. You will be in a struggle for sufficient light with your current lenses.
As for camera settings, you will have to be the final judge on that. You need to be familiar with the Exposure Triangle. You also need to be familiar with the highest ISO settings you can use before noise levels are too high for your tastes.
The aperture setting should be easy, wide open, except your lenses have variable apertures. Your aperture will change as you zoom in and out, which will require you to adjust on the fly. The EF 50mm f/1.8 STM will not change the aperture until you change it.
The challenge is going to be striking a balance between SS and ISO, so that you can freeze the action while minimizing noise from high ISO levels. The wider your aperture, the easier finding a balance becomes.
You will want to shoot most of your shots with the same exposure settings. The best way to achieve this is to use M mode. Using the other modes allows the camera to adjust exposure levels and you may wind up with exposures changing because one athlete wore a dark jersey in one shot, which will look different from a shot of an athlete in a light jersey.
On that note, you need to find a good set of exposure settings based on ambient lighting conditions, not your subjects. I usually do this by taking a few test shots of the room in M mode and ISO set to Auto. Adjust your aperture to its maximum. Adjust your shutter speed to at least 1/400. Setting it to at least 1/800 or faster would be ideal.
Find the fastest shutter speed that doesn’t cause the ISO to exceed your preferred maximum. Find a shutter speed that causes ISO to rise to half that value. 💯
Change ISO from Auto to the value you just found. You should have a set of exposure settings to use for the entire session. Good Luck!
--------------------------------------------------------
"The right mouse button is your friend."
