Depends on whether the idea behind "learn to implement custom buttons" is "because I want to have custom buttons on my website" or "because I want to be able to

Depends on whether the idea behind "learn to implement custom buttons" is "because I want to have custom buttons on my website" or "because I want to be able to use this knowledge on future projects." If you want to learn to make custom buttons with the idea being to be able to apply that knowledge elsewhere, you probably ought to learn to do them accessibly.