Greetings Mr V!
A car will do wonders ~ for you. Imagine yourself in this new thing and it probably makes you smile, maybe makes you dream of being happy. And you know, it might work.
If you are happier in general, & if a car can help you get there, I say, Yes! A good goal. The car isn't what will do it though, you being a happy guy to be around, you feeling good, content, that will work. You being confident & feeling accomplished will do wonders too. Those are attractive things.

A man looks very handsome, no matter his attributes, when he smiles. Try it.

The last guy I dated had a ridiculous car, I mean, beyond all reason expensive. He was really nice & I liked him, at first, and before I knew his circumstances. But his "stuff" couldn't compensate for his shallowness. He was self absorbed & felt the stuff made him better than everyone somehow. It didn't. He was a boring braggart.
Not that you would be...

Spiders are an interesting ...hobby. I used to keep several in my classroom as pets because they are amazing and kids love them.
Maybe, like others here have suggested, finding places, clubs, groups, that have common interests is a good idea. I imagine you've thought of that. There are lots of "meet-up" groups out there for all sorts of things.
And volunteering, a personal favorite.
You sound intelligent and interesting. That's a great start...