Best Settings For New Camera?

[Grandpappy]

I know there are LOTS of photographers out there and probably lots of GOOD ones too,so please have some sympathy on an old one,not new to photography but, new to DIGITAL photography! I understand some of the basic principles of exposure,composition,etc. but it's getting this Bl***y camera to work, the way I want it to, that's causing concern.The camera (Canon EOS 5dsR)came with a selected lens (Canon EF 24-105mm. f4 L IS USM) a strap,lens hood & instruction manual,etc. on disc! (thank you & have fun!!!)
I don't want to just stick it on Auto, but I fear I am incapable of understanding the complexities and customisable settings offered, I've set ISO to Auto( between 100-1600) and Aperture to Av-but that's it.
Can someone point me in the right direction,please? I've got books and I don't want to go to college(I'm 76 and haven't got the time).I've spent more time watching YouTube videos than I have taking snaps!
Cheers,anyone.

[bhg481]

There's really no difference between a digital camera and a film camera other than the fact that you can change the ISO setting without having to replace the film. That gives you a much wider range of light values ie, from barely light enough to see by to full sunshine on snow. It also means that you can use the ISO number as a third parameter when setting the exposure so, if you want to take an action photo in poor light, you can wind the ISO up to values you never dreamed of with film the drawback being the photos can get "noisy". Whenever I change my camera I take photos using all the ISO settings, compare the results and then decide what ISO value to set as normal maximum (you can usually limit the upperlimit used by the camera on auto) knowing that I can exceed if if desperate.

[Grandpappy]

Thanks BHG481. Have established that the ISO starts to show above 1600 on this camera ; that's with the lens at full aperture of f4- I can compensate a bit in LR & PS, but ? It seems you can set this thing to manual and still have it perform automatic functions,or vice versa???
But I'm having fun!
Cheers