Yes bike fit will solve the issue...but prepare to spend money

Few issue with penis numbness based on high chance to low
1) your saddle is incorrect and it's pinching the nerve or limiting blood flow . Need to get right saddle ( your sit bone is sitting on saddle instead of nerve sitting on saddle). May need to get one with a cutout in the middle and tweak fore aft and tilt
2) saddle too high

This is not the way to buy a bike. Suggest you go for bike fit and get your absolute measurement

Then see which frame your body align to

Sorry to say components vs price should never be a deciding factor. U can get a sl7 di2 vs cannondale caad alloy. If your body ngam on the cannondale, you will have less ache and probably faster due to improved comfort with the right frame

So choose the best frame for your body and then compare from there

To me di2 is the best. Absolute magic and smoothness of shifting and just charge battery once a month for 1500km total duration of ride and also depend if u change gearing alot

As for wheelset, once u get fast u will want faster wheels and often those that come with sub20k bike be it carbon or alloy isn’t that great. Unless it’s hyper or something

went for bike fit, and the Tarmac SL7 doesnt suit me well. size 49 too small, size 52 standover height too tall.

the emonda SL6 size 50 suits me well.
now currently using the 105 di2 and the stock bontrager alloy wheels first, chanaged tires to 30c vittorias.

gonna ride for 1 year or 2 first, only will look into wheelsets.