New player with a lvl 60 character, what now?

I just purchased The War Within on discount with a month of game time, and am excited to hop into the game! My main goal is to experience the campaigns and explore the world (of warcraft), as there is so much content to discover.

Due to an earlier promotion, I have a lvl 61 character. I got it with a lvl 60 boost, when there was a free trial of Dragonflight (dracthyr evoker ofc.). I started to unlock the allied races with it, although the number of spells at this level seems a bit overwhelming at first...

What do you think I should do for the best player experience?

  1. Complete the Dragonflight campaign with my lvl 60 character, then continue to The War Within campaign with the same one - in order to have a max level character sooner, earning some of the account-wide benefits for me to have on any later character. Then I can create a new character from lvl 1, leveling through and experiencing an older campaign.
  2. Start fresh with a new lvl 1 character, and complete the Dragonflight campaign with it, leveling up to 70, then complete The War Within campaign with it as well.

(I also have a lvl 70, and two lvl 60 boosts lol, I don't know what to do with them.)