I am not sure what brand but I have replaced a 10 footer. I believe that yours is a lot longer, therefore heavier and more unwieldy.
If you are replacing the whole system it is more difficult.So I think you will need at least three people with step ladders and strength. Two to hold it as you take the old one off and lift the new one on.
If it is just the fabric I would look at some youtubes. I searched "how to replace an rv awning" and found several.
https://www.google.com/search?q=yout...TF-8#kpvalbx=0