Few artists have been so widely discussed among guitar players in terms of tone influence.
Players around the entire world have tried to replicate Stevie Ray Vaughan’s licks and tone, and it sure as hell is not easily done.
The overdriven tone with sustain and harmonics can only come from cranked amps and/or pedals.
This is a big topic itself, we have to leave it out for now.
Also make sure that the neck wood and lacquer is smooth and not braking and limiting your bend moves when in contact with your fingers.