F550 drone kit assembly

I need help assembling the Chinese R550 drone kit
https://www.aliexpress.com/item/4000106319862.html?spm=a2g0o.order_list.order_list_main.4.1f9718026FWAUL
Can someone help me ?
Thanks in advance !

What part are you stuck on?

This video while not the most detailed, should hopefully help!