I guess it all depends on what kind of music you play. Theory wise Yes scales are top priority. I wouldn't say just focus on the pentatonic scale though. i've been playtin about the same amount of time but all my solos were vbased off that scale and i became confined to it. Honestly I would learn majors and minors first. Bein harmonic and melodic minors. Then i would start learning modes of the scale, then pentatonic. Start with it get it memorized then move on. it's not the most important