About 10 years ago I used a Nikon Cool Scan 5000 to convert slides to pics (tiff, jpg)...and edited with Adobe Photoshop

Later I just sent more of them away to this company...I have used them multiple times and they are very good.

https://www.digmypics.com/

Having done both I suggest sending them away because scanning them by hand and editing them was a huge PIA.