When first getting started the 12 bar blues chord progressions might seem strange, especially if your first introduction to them is through music theory. But, once you understand how this style of music works you can apply it to anything, which makes it quite versatile. Additionally there is the added benefit of fellow musicians nodding their heads because you will be able to talk the talk concerning the blues.
This repeating set of progressions makes it easy inside the framework to adlib and freestyle when you and others play which makes it fun and creative rather than just “rehearsing” the same old stuff. Writing flows from this type of creativity and it’s just plain fun.
Start by learning the blues chord progressions and you’ll be well on your way to mastering the 12 bar blues.