Lol people make modes seem super complicated; they're not.
Think of the major scale as being numbered 1 2 3 4 5 6 7. The modes are just playing those same notes, but starting on a different note, instead of 1-7. The dorian mode is 2-1, phrygian is 3-2, Lydian is 4-3, mixolydian is 5-4, aeolian...