How exciting!! It’s also Leo season! How fitting!
I think the best way to get connected to the lion spirit, is to connect with correspondences. For example, learning about the lions character traits, Using the strength tarot card as an energy guide, learn about Leo’s and Leo season, The full moon in Leo, new moon in Leo, any mythology connected to lions, are their gods or goddesses affiliated with Lions (Sekhmet).
I thinks it’s more than just invoking that spirit, it’s about seeing how this animal spirit plays in your life And how you can use that energy during certain times in your life.
Sometimes is their character traits that we need in order to pursue goals or achieve something, or even defeat/overcome a problem.
I hope this helps!! Good luck!!