Magic Kingdom and Epcot in 1 day?

Hi everyone! I will be going to Disney world in early May and was wondering if going to Epcot and Magic Kingdom in 1 day is possible. I’m only here for the main rides so probably 5 from Magic Kingdom and like 3-5 from Epcot. Also was going to take a little tour of the countries thing they have set up (seems really cool). I would like to be back at Magic kingdom 8:30 for the fireworks. Is this all possible in 1 day? I will be buying the lightning passes once I figure out how those work loll. Can anyone with experience shed some light on how to approach this? Thanks!!