Honestly, there is not a huge difference between these words when they are spoken aloud. They almost sound exactly the same and most Americans will pronounce them the same. But generally, Accept will have a more 'Ah' sound in the beginning and Except will have a more 'Eh' sound in the beginning. But still not very noticeable.

Here is a video: https://www.youtube.com/watch?v=-o0ZqxrMtVo

Wow!!! Now I understood, thank you so much! And this site is so good, I didn't know. :)

There is a difference between accept /əkˈsept/ and except /ɪkˈsept/ :) there is a website called Cambridge dictionaries online , it will help you a lot to solve your pronunciation issues :) you can read the complete definition and hear the word more than once and also give you examples so i wish this could help you !