I just had a photoshoot last night using a 20 year old camera on top of my normal gear and it produced my favorite photos of the night but im struggling with the editing process as it is an older lower mp quality camera and I’m used to editing raw files and the such. This is a new challenge for me and I’d love any advice you can offer.
Photoshop aside, which has been already suggested, you can try (without raising your hope too much) Lightroom’s resolution enhancement feature or Topaz Labs Megapixel AI.