In the beginning, it will be very challenging to shoot manually when you are outdoors, so we advise you to use auto mode only.
We recommend you to use a prime lens if you want to learn manual controls practically, so you have fewer concerns (as compared with zooming lens).
No manual settings are ideal due to the artifacts, lighting, weather, time of day, etc. So, it has too many considerations to remember.
When you are outside, first, you have to consider the aperture, shutter speed, and ISO then and adequately gradually fine-tune them all.
With the help of using aperture priority, the system dynamically sets the shutter speed for the key priority.