This is a nice comfortable tempo simple jazz blues. Playing the blues is not as simple as many people suspect. Although we can use just one key scale, the one scale that will (most times) be OK is a minor type scale, e.g the minor pentatonic or minor blues scale which is the same but with an added passing note.
In the example solo you will hear that I use the minor a lot, but there are one or two major 3rds to add some variety. These can work very well, but you must be careful where you use them.
A simple rule is that you can use the minor pentatonic or blues scale throughout, but for added interest you can also use major 3rds on wherever there is chord I.