I think it can make sense in display types that will be used at sizes where a wide space sticks out, especially lighter sans serifs. I find the results in book fonts generally solve no problems and cause weird collisions like “for you” becoming “foryou” that interrupt reading. I've even seen this in some great types, used by great designers, in their own books. Nobody has ever complained when don't kern to space, but I've had complaints when I did. So my rule is to only kern to space if I'm sure it's and egregious flaw otherwise.
The letter widths and ductus disagree with each other. You've mashed up the incunablula and modern eras with Times and an S right out of a Renaissance rationalist mathematical construction diagram. I don't see any concept, purpose, or unity.
But don't let any of that discourage you. It's a good first effort that taught you a great deal. Don't finish it now. Think of it as a sophomore year project. Go on to other things, learn more, and come back to this In a few years if you still like it.