How can I make a WiFi extender/access point using wifi only, I do not have Ethernet but do have a WiFi dongle to use. Note: I do not have Ethernet for my pi. If there is a solution please tell me how I can do this.
What you need is a wifi repeater that creates an access point and simultaneously connect as client to another remote access point. You can do it with the on-board wifi device without needing a second wifi dongle because it supports both modes at the same time. How to setup it you can look at Access point as WiFi repeater, optional with bridge.
But if you like to use your additional USB/WiFi dongle you can look at Access point as WiFi router/repeater with additional WiFi-dongle. It makes things easier.