Hi Tony, welcome to the forum, wow 45 year break from playing guitar, I bet you are glad you have taken it up again and building a kit is very addictive ! Bushfire sunrise one of my favourite DT colours.
Start a build diary and do a mock build to make sure it all fits together and all the parts are there.
Rub a water damp cloth over the body to check for any glue marks. Start sanding and beware the flame maple veneers are thin so start sanding the veneer on at least 240 or 320 grit paper. Rest of the body and neck can sand from about 180 grit to 320/400 grit.

Good luck with the build !

Ask any questions you have in your build diary. The wiring is probably the most difficult part of the build and setting (gluing) the neck the most important