Welcome to BF! IMO... when you try to customize and accessorize one kind of bike into being another kind of bike, you’re wasting good money. You won’t turn a plow horse into a race horse. Changing the tires and putting on a pair of the narrowest road tires the rims will accept might be a good and relatively economical idea, but that’s as far as I’d take it. Beyond that, I’d suggest just doing your best to ride it until it falls apart and saving up for a good road bike while you’re doing that. I had a hybrid 15-20 years ago. I did a lot of around town type riding with it and I even did a couple centuries on it. The killer fashionistas looked at me with horror and disdain at the local club century weekend, but I enjoyed the ride and I survived their attitudes as well. You may be surprised how long and well your hybrid will serve you as you develop your riding abilities and needs. IMO you don’t need a costly road bike when you’re starting out. Thus endeth today’s sermon...