Your old film was optimized by the lab when being printed all along and that is why we are sometimes disappointed with what we see at first with our digital shots. Digital images can record a very wide range of brightness and because of that the colors don't always "pop" or look as bright and good as they should. So some optimization is sometimes (often) required.
Though the cameras are getting "smarter" all the time. And if you shoot JPG's it will process them to a degree at the time of capture.
Some adjustments can be made in almost any software that will open the file; See below for some current choices.
Filters: Phone apps all have these --- Try Prisma, it is fun!
or
Real Editing has these main/basic processes:
Crop and Size
You want to control the crops for lots of reasons dealing with the composition but also on prints! If you let the printing company choose your crop you will be sorry. Your camera shoots at a certain aspect ratio, probably 3:2 or 4:3 but common print ratios are very different. Sizing is important for sharing too.
Color Temperature - White Balance
This is the tone of the image from WARM TO COOL.
Exposure - Bright to Dark
The camera does not always expose the image the way you want it to.
Contrast - Pop
If the pic looks dull it probably doesn't have good contrast. Often called "flat". Adjusting the darkest tones and the brightest tones is the easiest way to improve the look of the photo.
Color intensity - Saturation
Colors sometimes are more drab than you wish, or too vibrant.
Conversions - B&W, different file formats, Composites of multiple images
It Depends! The answer to all photography questions!
Apple and Windows have decent editors built in to the systems.
iPhone and Android phones have decent ones built in too.
Polarr - cross platform
Google Photos - cross platform
Most serious photographers end up going to Adobe Lightroom Classic, Adobe Lightroom Cloud or Adobe Photoshop
Read more at this Best of article:
https://enviragallery.com/best-photo-editing-software-for-photographers/
now includes very specific, targeted adjustments. Some times called Masks.
And AI, Artificial Intelligence is being added to remove or add objects, apply typical edits and more.