Alright,
Nice to see some photos finally posted. I'll do you one better at the end of this post, and post the "Sumo" stance being utililized by yours truly.
In the first photo, I notice your arms are fairly long, so you may want to give a try to the "Sumo" form that I explained in an earlier post. Plus, from the somewhat conventional stance your in...it looks like your shoulders are past the bar, and that's a no-no.
Yeah...give the Sumo stance a shot. You begin the stance your your feet pointed to the sides a bit, not straight...but yours are already like that, so good. Next, spread your feet far enough apart from each other, so that your shins meet the end of your nuerling (jagged part of bar where your hands are - you want your shins all the way over to the ends on each leg respectively).
Next, on your descent...like I said shoulders back.
At ALL COSTS! A good thing to do to keep form good, is tilt your head up, so you're looking right at a point on the ceiling. Then, begin to go down. Chest out!
Once your hands meet iron, set your grip. The grip in your first photo =
bad. You want the over / under bro. The grip you have in your second photo....yeah....that one (without that leg over the bar crap...but the grip is good).
Once you begin to bring that bar up, keep it
AS CLOSE to your legs AS POSSIBLE. I mean so close, that when you do the lift properly...it will cut up your shins and upper leg (don't worry...cuts scab & scabs fade with time

). Once you get into heavier weight amounts, that's when you'll see people put baby powder on their legs, cause then the bar slides right up.
If you don't already have them, invest in a good pair of wrestling shoes. They are flat on the bottom, so you'll be able to establish a better base for your lift, then you will with everyday tennis shoes.
Get yourself a strong, thick weight belt as well. Will save your lower lumbar from lots of pain, and possible injury.
About the second photo...I don't know what the hell you're doing - but don't EVER use that form with weights on the bar. You're just begging for an injury (ex: hernia, bulging disc). Only time you
might want to use that, is for stretching purposes ONLY! No weight on the bar though! Easy way to tear your quad....and you don't want that.
Here's me with 490 lbs. on the bar (lifting in the 148 lb. class):
As you can see...the stuff I'm telling you is not BS. I use it all myself. Sumo stance (even though the photo was at the peak of the lift), over / under grip, wrestling shoes, double-ply weight belt, baby powder on legs for easier lift / bar as close to legs as possible (you'll notice the cuts on my left leg - right when you're looking at the photo)...all that man. It works - so just give it a shot.
Let me know if you need anymore help bud.