I know the dlc takes place after main game, but why then is the level requirements so low? Will u break immersion doing it early?

i dont wanna steamroll the difficulty. So i don't understand why ubi made the dlc requirement like early game.

Is it possible for me to do druids early? i dont wanna ruin the immersion and chronological feeling of it. Isle of skye was cool because it can happen anytime so i just did it when it unlocked.Id still really like to try the DLC tho. Ive played valhalla base game in the past and loved it on ps4. I got the game with dlc now on pc since the DLC seems cool