BikeGuy2 Given the sentimental value, I'd favor fixing it up, but there are limits to how much any bike can be adjusted to fit someone.

Thus far, you and everyone else here is stumbling around in the dark with respect to specifics, which are required to actually help you.. You've been asked up-thread (by bikemig & others..) to provide some details. Without some specifics , all folks can do here is "say stuff about some things..".

What's your height? Inseam length?

What size is the bike frame?
https://www.ebicycles.com/measure-fr...e/traditional/

This frame, given the effective top tube length, is a good candidate for a drop bar conversion, but that may be more than you want to take on
Show Your Vintage MTB Drop Bar Conversions