Will the APR % rate be better if I have good credit?

The answer isn’t simple, there is definitely a link but often there is more to it. If a lender wants to attract customers matching a certain criteria, they might offer a lower APR. The APR also changes based on the amount you borrow and the duration. A medium amount over a long time may have a low APR even with bad credit. A small amount over a short time will probably have a high APR.