Here's what I think I would do if I were in your situation with being a novice bike builder and with limited funds.
I would rebuild the bike as is and use this experience to learn about the engine and everything about the bike.
Ride it and learn how it handles. THEN if you still aren't happy with how it looks, you can change the seat, make it into a cafe, bobber, whatever to your content.
I would also urge you to think creatively for solutions to your design. Not everything needs to be cut up and discarded. You can just as easily turn it into a cafe racer without hacking off the frame and welding a hoop on.
Hell, I turned mine into a vintage war bike and completely changed its stance without doing any of that. I can easily turn it back to stock OEM condition with little effort.
These bikes, although still common, are getting rarer by the day. A stock bike will be worth a lot more than one that's been hacked up.