Watched the very first show in the morning at 26th 6 am this is a piece of art, perfection, interconnecting all the previous movies giving the best out of it, a perfect combination of all the emotions, say humour, darkness, sadness emotional all in one as combined together to make a best film ever by the MCU.
So do watch it even though you haven't the previous parts but some of your friends might have and after the movie ask them how was it they will be like cant this be less emotional and they will tell all the story which are connected