How do I split up players?? ;/

If you have simply two teams, you can use a bool switch. This is just a value that you will turn on and off while iterating through all your players. You check it to decide which team the current player will be assigned to.

ex;

local bool = false; --It's off rn
local players = game.Players:GetPlayers() --This is your table of players
local team1 = game.Teams.Team1 --This is your first team
local team2 = game.Teams.Team2 --This is your second team

--Now, iterate through your table.
for _,v in next,players do
    bool = not bool --Switch the bool!
    --Now, check the current value to decide the team.
    if bool then
        v.TeamColor = team1.TeamColor
    else
        v.TeamColor = team2.TeamColor
    end
end

If you want to reduce the code even more, apply some statement logic :D

for _,v in next, players do
    bool = not bool
    v.TeamColor = ((bool1 and team1.TeamColor) or team2.TeamColor)
end