Re-hanging the heavy/awkward exhaust can be a bit of fun.
I tied the muffler up, so it can move about - while using a mirror to line up and hand thread in the nuts on the engine studs.
Taking the weight off of you is a help - while you get things connected under there.
Everything is loose until all fittings are in place - then tighten. GENTLE with those stud nuts! - it is possible to strip stud from engine head!
BTW- I disconnect the distant end of the oxygen sensor wire, and leave the O2 sensor fitted to the exhaust pipe (it case it is seized)
Stig