Aperture Priority was my first step in getting to manual mode. Some photographers only shoot in manual mode and there are times where I predominantly shoot in manual mode. But before getting to full manual mode you need to have a good understanding of the exposure triangle. I have a short tutorial on my youtube channel that will help you understand the exposure triangle.
Let's break down one leg of the exposure triangle and understand when to use Aperture Priority. Aperture Priority is a semi-automatic mode with one manual control. To be in full manual mode all of the settings need to be in manual.
With some cameras, there is an option to set a minimum and a maximum shutter speed to force the camera to stay within a specified range. However, I didn't see that option until I purchased a high-end camera. It was not a feature on my canon rebel xTi or 5Ti.
When is aperture priority the way to go?
I encourage you to try aperture priority as a stepping stone to getting to full manual mode. And once you have mastered aperture and shutter priority modes don't be afraid to use them in the right conditions. If you don't have time to think through all the settings for full manual mode, aperture priority is a good choice when you want to control the aperture.
You will find that only practice will make you better. Reading this blog or watching videos is good, but make sure you take what you learned and practice in the field.