How would I become a vehicle tech inventor?

I think I've got what it takes to become one of those guys that wears a lab suit and creates ideas for cars and what not & recently came up with a few inventions, drew them out and wrote descriptions of their operation and purpose etc but I'm reluctant to just crop up to a major car manufacturer and go here I've got some bright ideas for you seeing as manufacturers such as honda seem to think that if they like an idea which is offered to them then they mysteriously thought of it before you brought it to them. But with no evidence… How would I become a vehicle tech inventor?

Should I voluntarily repo my car?

So i was recently in the hospital and due to my stay there I lost my position at my job and I lost my job. I found another one, but it's no where near as much pay. I sold my home because I no longer was able to afford it, but the tricky part is now getting rid of my car. I made some dumb decisions in my past and I ended up with a bunch of trade ins so I'm 20k upside down on a 2017 prius. It was financed by toyota! I think I can pay the difference because I have a paid off 1997 beater honda that works that I can use. I just can't pay the $750 a month plus $600 insurance. Would this be viable? What would happen to my credit? WOuld gap insurance cover the rest?

Will a car dealership work with me if I'm gonna lease a new car, while trading in the car I have, which has an outstanding loan against it?

The car I have now has a loan against it which is worth more than the trade in value of the car by about $5000. If me and a family member were BOTH looking to lease a new car (so 2 new cars), does anyone know if a dealership will be working to work with me in any way?

Also the cars looking to be leased are not high end or luxury cars, they d be coming from a dealership like Honda, Toyota, or Subaru.

Can car keep up with a 98 Altima gxe or a Mazda 3 through curves and straighaways?

I have an 03 Honda Element with the 4 spd auto awd. My question on the highway if my car needed to keep up with a driver in one of these cars, is it capable of doing so or is it underpowered. I mean it makes the most horsepower and torque out of the two. The Mazda 3 is a 2006 3i 5 speed manual and the Altima is an automatic in this case