I like to make it simple. There is only one scale! (bear with me). play your E string open then play every fret in order til you come to the octave on the twelfth fret-you have just played the chromatic scale in E! Every other scale is made up of these twelve notes. If you don't want to study music theory you might be better concentrating on picking exercises to make you fast and fluid and then experiment with the chromatic scale to find different sounding scales. You will end up playing scales but your route to finding them will have been more intuitive. Try this exercise, use all four fingers on each string, make sure each note sounds clear and pick cleanly down up down up (assuming you use a pick). practise with a metronone and try different combinations of notes the end goal is to have fingers that will do whatever you ask of them.

-5-6-7-8---------------------------------------
--------4-5-6-7--------------------------------
----------------3-4-5-6------------------------
------------------------2-3-4-5----------------
--------------------------------2-3-4-5--------
----------------------------------------1-2-3-4 and back etc etc