Not sure what is available for a 97, but I upgraded to LED bulbs in my 2014 and it made a big difference. Price wasn't too bad. Around $70 IIRC. To do it right you really need to replace the entire headlight assembly and you can spend near $1000 to do that. The bulbs I put in my truck aren't as good as the factory LEDs on our 2020 Explorer but were a significant upgrade. The factory lights on my 14 were terrible.
