I'd do a lot more shopping before I would buy that car. A 1640 engine will soon get you completely frustrated with the lack of power. I made the same mistake with my first speedster buy, which I sold the same summer I bought it.
You state that you are not much of a car guy, and I think that is obvious. You are caught up in the romance and dream of a sweet little two seater sports car that looks lovely in pictures. I think you have bought the seller's pitch completely, as so many other first time speedster buyers have done, and as so many have subsequently regretted their impulsive purchase. I did the same years ago.
It's clear you are chasing this car based on emotion, not on logic. I am not recommending you buy the 'red car' that is advertised on this site, but for the same amount of money, this 'red car' is three times the car. Anyone being rational, and not being caught up in the dream of speedster ownership, would do a straight forward comparison, and would come to a rational decision that for the same amount of money you want to spend on this incomplete speedster, you could buy a much better vehicle.
You need to slow down, do some rational thinking, and a lot more shopping, before you end up with a less than fully useful speedster that you will soon realize is not what you really want.