Tones are fine, scanning seems OK. For least dust or scratches:
- Practice loading and also unloading (!) the reel/s with scrap film until you do these smoothly. Do it under light first until you master it with no issue and then repeat it with eyes closed or in dark until you do it with same ease. Pay great attention to not scratch the film while taking it out of the reel for it's too soft now, better hang one end on a place first and take the reel off by rolling down. Keep in mind, the place you hanged it after taking out of the reel will be the drying location too. Not to be transported from one location to the other.
- Use a few drops of something like Photoflo in your last minute of washing, hang the film with a clip at the bottom to make it dry uncurled. Sweep from top through bottom between two WET fingers to wipe off excess water and leave it to dry. (Do these in your bathroom if you do not have a darkroom or in a remote corner in your house away from traffic, away from air circulation.)
- Once dried, carefully cut it into 5-6 frame strips whatever your scanner accepts, wipe off softly with an anti-static brush/ cloth, then scan. If you again see dusts, hairs, lints, etc. then you need a cupboard to dry film.
- You can make a make-shift cupboard by using a long nylon bag dry-cleaners use while delivering the overcoats and two wire coat hungers connected to each other perpendicularly. The bag must look like a pipe when hanged, then hang the film into it to dry.
To clean dust out of a dry surface is no issue but to "clean" dust sticked to the emulsion when its wet and dried there is a PITA.. Think of ways to protect your wet film from the household dust within the period of drying.