Sorry, I don't get how this mock works. I don't see any directions.
It's pretty simple.
Just take a look at the lists from rounds 1 and 2 to see what players have already been selected.
When your pick is up you can select any available player, or you can try and make a trade if somebody wants to move up, or if you want to move down.
I think the plan is to draft as many rounds as we can (up to 7, of course) so accumulating draft picks isn't a bad thing.
You have up to 24 hours to make your pick, but probably won't need that long.
There have been a couple of trades, but at this point I think most people are just picking at their spot.
I think that's pretty much it.