Here are several more turnarounds to give you some new ideas. Any of these turnarounds can be used at end of a 12 bar Blues progression. Often the choice of turnaround depends on the song and what the other instruments are playing. It is always useful to have a collection of turnarounds up your sleeve.
Keep the little finger on the A note on the first string while changing notes on the second string.
This variation on the previous turnaround ends on an E9 chord.
These next two turnarounds end on different shapes of the E7 chord. Now you have the basic idea of how turnarounds work, try creating some of your own. Listen to Blues albums for more ideas, each player will have a slightly different approach to turnarounds.