I have a quick question for you. Can you play a BMaj7 b13 chord?
How about a Csus2 #11?
If you are unsure I have great news for you. You'll know how
after watching the free video I just prepared for you. It's way
easier than you think and only requires a super simple shape.
After watching the video not only will you be able to build any
chords, but also construct any scale you wish without having to
memorize a bunch of scale diagrams!