When I got the gun, the butt was very low, so I had to hover over it with limited support while I tried to sight through the scope. It seemed a little strange to put that stock on a gun that came with no iron sights. I'm not complaining. I probably have $550 in it, including the glass, sling, and cheek riser, and the ammo is very cheap and shoots well.
I'm Googling around to see if there's a table out there with 4 adjustable legs for under a hundred bucks. The front rest can't overcome the slant of the table on ground that isn't flat.
Go to a building supply store and get 2 8x16", 1 1/2" thick concrete blocks to put under the front legs to level up the bench. If it's not high enough get 4 blocks and place two under the front legs.
The proper way to hold a rifle at the bench is to have the front bag soft enough, and shaped well enough to cradle the rifle. If it grabs the forend, sprinkle some baby powder on the bag to reduce friction and provide uniform rearward movement of the rifle. A stop on the rest should position the forend of the rifle at the same point for each shot. The rear bag should also allow smooth slippage when the rifle is fired.
The rifle should be
firmly against your shoulder, in the "pocket" between the shoulder socket and the neck, but not against the collar bone. Position the rifle exactly the same for each shot.
Use thin overhead muffs and position the shooting side as high as possible, but still covering the lower part of the ear. If your head/neck doesn't allow that, use ear plugs, at least for the rifle side of your head.
If you have a tendency to flinch, or shooting a hunting rifle that has considerable felt recoil, buy a PAST "magnum" shoulder pad that straps on. If shooting a magnum or other very heavy-recoiling rifle place a sandbag (I have a softly-filled bank bag) between the buttstock and your shoulder.
It's important to be comfortable when shooting rifles that recoil about like a 30-06, or greater. You can't group when you flinch, so if you can't use pads to keep from flinching, consider a lead-sled as the last resort.