View attachment 62771 Welcome.
Headliner install sucks, but is doable. Get lots of small spring loaded clamps. Headliner adhesive, and test fit your bows in the roof, and trim the headliner close to mock up its final size prior to starting; use the clamps for this..
ANVIL 3/4 in. Mini Spring Clamp-99693 - The Home Depot
Set the headliner in the sun to get warm & smooth wrinkles. Work from back to front; make sure you have the little anchor wires for the rear most headliner bow (they go in the the forward facing holes) Glue, stretch, and clamp as you go forward. Mark/make holes for the suit hooks, shoulder belt bolts, and dome light as you go. Take a break when your arms get tired.... good luck.