As a suggestion ... I would add an extra step ... drain the canned fruit, and dissolve the pudding mix in the liquid. Then add back to the fruit.
Mixing it as originally stated is fine ... though you may discover it's hard to get the mix fully dissolved plus the more you mix it to make that happen, the more you will damage/crush the fruit. To me, it'll be far nicer with the fruit nice and solid!
ENJOY!!!