Hi Pango. I am so sorry for your loss.
Don't look at this as one huge challenge. Break it up into parts, and gradually ease your way into it. This isn't a singular objective or one huge block. It is the culmination of many smaller things into something wonderful.
Try to take it easy...gradual, small steps, with you moving on to slightly larger things each time you get more comfortable. That, I believe, is the best way.
Good luck, and God bless.
Harley