Hey & welcome.  Hope you are enjoying the blues course.  This link will take you to the GT song catalog sorted by blues songs.

https://www.guitartricks.com/songs/blues

From there you can sort by level.  For example, this Sonny Boy tune is pretty easy level.

https://www.guitartricks.com/tutorial/2190/

And this Jimmy Rogers one is a little more detailed.

https://www.guitartricks.com/tutorial/1763/

All the way up some classic SRV.

https://www.guitartricks.com/tutorial/2353/

There are also made easy versions of some blues tunes.  Hope that helps!