Riv-Bike folks are into normal looking riding clothes.

Consider Baggy MTB shorts for the pockets, and some padded liner shorts
or just the lycra stuff , to wear under them, get several to wash clean and dry in sequence.

cooler weather put on something longer under the Baggys

and then of course with rain over-trousers , you just omit the outer shorts,
and wear the other stuff under that. bike shorts and long underwear.