Make sure you read the blue book first/as soon as possible.
Adjust your setup here a bit so that your wrists are straighter and the middle knuckle is pointing up. This will have your wrists extended back only a tiny bit. Then make sure your elbows are slightly in front of the bar. Take a big breath and keep your ribs down (tight abs) as you do. Then punch your hips forward harder and push the bar *back* to your shoulders. Since you are then doing the 1.5 version of the press make sure you breathe at the top (lockout) and do your best to return the bar back to the exact setup position on the way down so you don't wind up in the wrong position. This takes practice and is one reason we don't recommend people do the 1.5 version as beginners.