Thanks for showing me how it's done

Wish the FoV was this wide for my shot.
Can I ask about the processing? How do you go about the Ha and the OIII? Do you play with the Ha first, stretch it etc until it looks like a good image in its own right? Then do the same with the OIII separately, so it looks like a good B&W on its own?
Then combine them into the different channels?