Congrats on working through the courses!  It sounds like you are missing some fundamental music theory concepts to integrate all those licks & ideas you've learned.  So posting this in the music theory forum is exactly the right decision.

Try working through this collection of tutorials on the basics of improvisation.  

https://www.guitartricks.com/collection/learning-to-improvise

These start relatively simple, but get more complex quickly.  The essential idea is that improvisation and all musical forms are a process of finding the key (meaning the appropriate scale to use), targeting chord tones and then making musical phrases (i.e.: melodies, licks, lines).  These lessons are done in a generic style because the ideas are applicable to all styles of music.

After that you might benefit from these tutorials on how to use these music theory concepts in a blues style context.

https://www.guitartricks.com/tutorial/217/

https://www.guitartricks.com/tutorial/2380/

https://www.guitartricks.com/tutorial/2768/

Hope that helps.  Please ask more if you have more questions.  Keep practicing!