The simple answer

Keep the uF the same. While you might be able to get away with something close, it's not a great idea.

There are plenty of places online that you should be able to find what you need

The voltage is the minimum. You can get anything rated equal or higher. But the higher you go in voltage, the physically bigger it will be. Thankfully capacitors are smaller then they used to be, but it just might not fit if you go too big

Keep the Type the same. So if electrolytic, keep it that way.

axial v. radial is just if the ends come out the same side or opposite. But they are the same thing. It's just how it fits on the board