Your seat looks fine... In your first set of photos it looks like you might be pointing your toes... that could contribute to foot numbness

I also can't tell if you're clipped in ... but it looks like you're on a pretty small platform if you're not clipped in, so you might want bigger pedals... And in the 2nd set of photos it looks like your foot is a little too far forward on the pedal... You want your ball of your foot taking the pressure of pedaling... so if you're riding clipped, moved your clips back so that they're under the ball of your foot. If you're not riding clipped, just move your feet forward.

You also look like you've got a death grip on those handlebars.... Ease up on them. If you're coming up to a bumpy section of road, get the weight off your wrists in preparation for it & bend your elbows a bit to absorb the shock... Not enough that you don't have control if a bump tries to grab your handlebars, but enough to get the strain off it.

I bought pearl izumi gel gloves once 'cause they claimed it was all ergonomic... but I found it more comfortable to ride without them. So I used a pair of needle nose pliers to yank the gel padding out and they've been great ever since then. They are nice in that they're sort of short and end on my hands, not my wrist... I still buckle them very loosely.

I like the specialized gloves that someone else mentioned... I haven't noticed the padding being a problem in those, but they don't have velcro adjustment at the wrists, so they irk me slightly in that I can't make them looser.