Help with First Next Step Putting '65 Formula S Back Together

After prettying much stripping our '65 Barracuda (except for leaf springs, K-member, steering column, brake booster, torsion bars, control arms, front brake drums) and painting inside and out, what to do next? I am thinking perhaps headliner and then windshield and back glass?

If I'm correct, what pieces do we need to install the headliner? I know there are two channels with "teeth" that go along both sides of the roof to pin the headliner on, anything else besides some insulation like Dynamat to press up against the ceiling? I did not expect this painting process to take more than two years and I don't remember the order in which I stripped things (you know how it is). Just asking for a few of the very first steps. Thank you.

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