Blues is a minute to learn, lifetime to master...
SebastBerg is spot on to listening to other blues players and rock n' rollers. You will become familiar with signature licks and phrases most bluescats and rockers use.
Maggior is on point with learning from a real teacher. This can save you incorrect information, time, and frustration. The teacher is on point with knowing that the 1st position of the minor pentatonic is the goto lick creator for beginner to advanced. Learn the basics there, it's a great start.
You are a pianist. You can use this to your advantage. If you know your modes for the major scale, dorian and aeolian are the best to use with blues. You will find them fitting in nicely and if you look deeper, theory tells you why these interlock.
Key things in blues guitar?
- work on your vibrato!!!
- learn to bend up AND down to the right notes
- sliding up and down to the next note is also heavily used
- hammer ons and pull offs are always used
- phrasing is key... just as we talk.
*example... when someone is understanding what someone else is saying before they even finish the sentence, they might say Right Right Right! or Right on! or Riiiiiiiiiiight!
do that with a single note or two...
Right right right.. usually when spoken, this is even like quarter notes. Maybe play your lick all on one note.. or maybe ascending notes like sometime we ascend pitch in our voice when we talk and get excited
Right on! ... usually when we speak this it's quick and most emphasis and stress is on the 'on!' and we descend in pitch with our voice. Do this with two notes in the pentatonic
Riiiiiiiiiigh!? ... when spoken, usually slooooow and pitch goes up in our voice to imply ... agree ? Do this with a bend... bend on your B string. Bend your D up to an E!! Do it slow. And if you really want a fun way to 'say' that... hold on your D, pluck the bottom two strings and you'll hear a D and E ( dissonant ) and bend only the D to MATCH the high E and you'll hear it come into perfect pitch. If you get courageous, wait as the D matches the other E and then add a vibrato. Cherry on top. It's fun.
Hope this helped.