If you want to shred, you're gonna have to start slow. First, learn how to properly set up your guitar, including intonation, truss rod adjustments, and general maintenance.
Most shredders don't play out of whack guitars with mile high action.
Secondly, grab a video series on rhythm playing. Learn to play as tight and precise as you can. Soloing sucks without a good rhythm foundation.
Next, acquire a metronome. Grab some scale books and learn every pattern you can, S-L-O-W-L-Y, and with the most efficient technique possible. Ever watch an Yngwie video? He's shredding, but it looks like his fingers are hardly moving. That's efficient playing.
Finally, put aside hours every day (Steve Vai used to have a 10 hour practice schedule) and spend it learning how to be fast.
Or, you could jam with friends, have them show you some stuff, and play with feeling. Learn a little at a time and don't rush it. You'll find that your vocabulary will grow.