Turntable help Please

I am seriously considering getting back into analog. Any help or advice would be greatly appreciated...would it be worth the time to try out my old turntable from college (26 years). It is a Philips Electronic 777 Direct Control. It is on a suspended table and is belt controlled. Interconnects are non-detachable - is it possible to change out the tonearm? Is it worth investing in a decent cartridge? Does anyone do mods on old turntables? I don't presently have a phone stage only a line stage (CJ premier 14). Thanks for any suggestions...This table sounded good back them but that was when I was into music and not an audiophile!!!