It’s your choice, as explained in my last reply. You can do what you suggest or you can decide on an available single key to press instead of having to hold SHIFT as well as press A.
For example, would it be convenient to press the / key next to right SHIFT instead of using SHIFT + A?
Or would you like to make SPACE do the same as SHIFT + A, so that SPACE always starts playback (or if audio is already playing, stops and sets the cursor at the stop point)? If you make SPACE do that, you will need to use the yellow Stop button if you want to stop and set the cursor back to where it started.