Absolutely, rescind your contract immediately. You won't lose any money by rescinding. If you don't, you're locking yourself into paying many thousands of dollars in maintenance fees over the next 40 or so years for something that may not work for you. If you don't rescind, then decide you don't like it, and try to sell it, you're likely to lose money, as you probably paid more than the contract is worth on the resale market.
If we haven't convinced you yet, let me address your individual questions.
1. You bought at Aulani, but will never go there: you'll be paying high maintenance fees for a resort you'll never use. The fees at Aulani are higher than at any of the WDW or DL resorts.
2. Don't live close to FL or CA: if you don't plan to stay at a
DVC resort at least every other year, there's no reason to buy DVC. The only reason to buy is to save money on stays at the DVC resorts.
3. Should you use it for RCI or cruises: neither is a good reason to buy DVC. RCI takes a lot of advance planning, sometimes years, to get the resort you want, and you can buy timeshares for a small fraction of the cost of DVC that will get you into the same RCI resorts. As for cruises, they take a tremendous amount of points, the amount of points required to cruise goes up every year, and
DCL can and has limited the number of cabins available on points. Sometimes they don't allow any points booking at all, for months at a time.
So, cancel this purchase, and take your time doing research. First, you'll need to learn what DVC is and how it works - in detail. Then, figure out if DVC will provide the kind of vacations you want, for the value you want. All you are guaranteed in the contract is the right to book stays in DVC resorts, subject to availability, for the length of the contract. Everything else can change substantially, or be taken away altogether. So, only buy if you see yourself staying in DVC resorts, at least every other year, or at the outside, every three years, for the next several decades.
