The bike is free and really plan to use and keep it, probably won't try to make it perfect but will get it back to mechanically sound even if it doesn't look amazing. If I end up really liking it then the cosmetics could be looked at, frame coating, spraying etc.
From memory I enjoyed riding it before, I went from a DT175MX to the Sherpa and had a hoot, and the only thing that sticks in my mind as akward was the brake gear change sides. I drive a more modern bike as well so sure that will be a shock to remember what side is what.
Did later models go to left foot gear change?