25.77Your basic blues toolkit

You need these elements:

1. 12-bar form
2. I7–IV7–V7
3. shuffle/swing
4. minor pentatonic
5. major pentatonic
6. blues scale
7. ♭3→3
8. ♭5→5
9. call-and-response
10. turnaround

If those are secure, you can already play convincing simple blues.