IMO, learn blues first so you know all the phrasing and stuff. Once you get better with the blues, the skill to shred will come naturally as you'll get more and more accurate with your fingering.

Shredding with no knowledge of phrasing will get you nowhere. See, you get to play about 100 notes a second, but which notes? You'll end up going up & down scales which is pointless to do & boring to hear.

Just remember, shredding will come naturally as you'll get more experience (usually after a month or two). Learning to phrase and play soulfully takes a lot more practice (years, likely).