Ok, so you are successful with your programmer construction - programming SW is working with programming HW without errors.

Next step is to test if PIC is something doing after it is programmed. Here you can find trivial construction projects I have used for my testing purposes.
You can find here:

• USB bootloader principles and how to work with it
• LED blinking project to be used with USB bootloader
• LED switch project compatible with USB bootloader

These are compatible with my programmers you can find on my web pages.