What are the prerequisites for the current Blues and Rock courses? After Beginner, after Intermediate or other skill level?
Hi Mark,
Welcome here and I wish you a lot of fun 
start at the beginning because blues - rock or any music style starts with the same basics…during the beginning course you will soon be surprised with the first blues and rock lessons and when you have come to the half of beginner courses grade 3 you can you already play a nice piece of blues 
… peek a bit ahead if you’ve been busy for a while and get impatient , but lay down a solid foundation …Again I wish you a lot of fun
Greetings,Rogier
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