Safety is the most important thing, you will be climbing higher than you have hand holds, so you will be holding the tree, you will also have to let go of the tree to tie on steps/sticks and the stand.

You want a belt/harness that connects from your front/hips to the tree, using a harness that attaches at your back is no fun. Ideally you have some type with a hip connection like SOP, or even a belt that you can spin the connection around to your front and the belt under your armpits. You want these types cause you can then raise the tree section high as you can and actually lean back into the strap, and it will hold you to the tree but give you both hands to work.

Once you are up (oh ya, before you leave the ground tie a rope onto the stand and onto your belt, put the stand on the opposite side of the tree you are climbing so if you fall you don't land on it.). Pull the stand up by the rope.

Assuming its a chain/strap, you hold the stand in your left hand and swing the strap/chain around the tree and grab it with your right hand. You want the connection hook on the stand on your side, not the other side of the stand.

Pull the chain/strap as tight as you can and attach it. Push down on the stand to seat the chain/strap against the tree.

Now the fun part. You have to climb onto the stand, IT WILL MOVE!! The added weight will push the stand down a few inches and it will tightly seat it against the tree.

all done!