Easy in theory, can be remarkably challenging if you're picky. Getting the color, exposure and contrast right and eliminating dust and scratches are all challenges to the process. Really picky folks use different profiles for every type of film.
But the basics--load a group of slides into the carrier and shove it into the scanner--are pretty simple, so taking the DIY approach with an inexpensive scanner seems like it's worth a shot. Better still, hire an eight-year-old to do it for you if you have a lot of slides.
The slides have to be scanned into the computer as JPEG files. You can send your slides to businesses that provide this service or you can purchase a scanner (IIRC about $75) and do it yourself. Be aware that scanning using the relatively inexpensive home scanners is a tedious process but also allows one to eliminate duplication and relive a lot of memories.
p.s. The scanner software is at least as important as the hardware. I'd check on line reviews before taking the plungs.