In this tournament we'll be practising the main line of the Nimzo Indian Defense, here are some useful resources to read before the tournament kicks off:
https://www.chess.com/openings/Nimzo-Indian-Defense
https://www.simplifychess.com/nimzo-indian/index.html
https://en.wikipedia.org/wiki/Nimzo-Indian_Defence
https://chesspathways.com/chess-openings/queens-pawn-opening/nimzo-indian-defense/
This is not intended to be a quick-fire tournament, games have 3-day time limits and only one simultaneous game at a time between each pair of players, to give players some time to think and consider how to play through these games.
For a (very) brief overview of hypermodernism, see the wiki page at https://en.wikipedia.org/wiki/Hypermodernism_(chess)
Good luck!