Unless you are making really thin blades you will grind the bevels first. As far as warp, there are many threads in the past if you search on straightening blades. You can straighten from the quench for a brief amount of time.
After that, you can use the method Rick Marchand posted about recently and straighten during the tempering cycle.
Take the time to layout and drill your pin holes in the tang before heat treat as well.
Have you tried to find these answers by using the search function?