Classic New to dragonflight?

Hi,I stopped after shadowlands and after seeing the war within and the 10.2 patch i wanted to give me some WoW.As someone that has never played Dragonflight, do i have to finish all the seasons to get the new one? Finishing the campaign right now and dont know is it worth finishing the older season campaigns?Have a nice day via /r/wow https://ift.tt/4LFThsI