You can use a sound deading material like dynomat above the headliner. There are cheaper products out there besides dynomat that work just as well.
Working by yourself on any car can get boring at times. I've been working on '57 Chevies since 1970 when I was 12 years old. Got my first a BelAir 2-door Hardtop two years later when I was 14.
My very first car that I still own to this day.
Things kind of snowballed on me after that cause right now I own six (6) '57 Chevies.
I do as much of the work on them that I can. NO ONE touches my '57s!!