There's not really a spell, but if you get really good, and I mean REALLY good at energy work combined with elementalism, it is SOMETIMES possible with lots of energy. It takes years though, and isn't really worth it as in the end you can only pick up light objects like forks and spoons.
To make it possible you would have to rework your way of thinking and reality. Currently you think that gravity exists and that object DO NOT float. Once you can change this way of thinking then you can try levitation but it takes years to undo this.
You have wasted half a year then. You should know that magick doesn't just work by saying a little poem. YOU are the source of power. Levitating is insanely difficult, and it takes years of practice to be able to do that kind of telekinesis. Stop wasting your time.
Physically you cannot. The word "physical" comes from its basic word "physics". Thus, your physical body (your human form) must follow and keep track of the laws oh physics and be fully under their influence.
One of the laws of physics says that we, human beings, don't have the ability to fly literally . When I say literally I mean to what you call flying like a bird, in a verbatim way of saying, not with an airplane or another mechanic tools for flight which have been developed and engraved by physics and engineers. So unfortunately you cannot break the laws of physics, sorry to dissatisfy you.
However, we have many levels and layers of our body. Spiritually, you can levitate with your astral body while astral projecting or while being in a deep state of a serious meditation. While meditating or astral projecting, we do not use our literal (physical) body. We use our astral/spiritual body in order to get freedom from the laws of physics and levitate spiritually.
If you wish to get further, learn about deep states/forms of meditation and astral projection.