dahut

Welcome.

I just ride faster when my hand gets numb. It doesn't eliminate it (I dont know if you can), but It gives me something else to think about.

First, check your reach (seat to handlebars). There are several arcane, confounding calculations available to get to this number, which you can google. Or you can just use the old fashioned way: When you lean forward and reach into the drops, the front wheel hub should be obscured by the handlebars themselves.

Second, try shifting your seat position around and tilting it slightly nose up.

Tinker around with these two positional adjustments until you can "float" on your sit bones, posting on the seat. You don't ride the seat, you pivot on your sit bones.
You're trying to just balance there, without feeling like you are tipping forward. This takes the weight off the arms, which is where the numbness originates.

Then, pedal faster.

PS Cycling will soon have you giving up on running. Work at this seating business til you get it right.