“Or do you not know that your body is the temple of the Holy Spirit who is in you, whom you have from God, and you are not your own?”
How are we to be filled with the Holy Spirit? This is a command and everything that God requires of us He also teaches us how to do. Do not think of the Holy Spirit as a substance. The Holy Spirit is a person. Don’t refer to the Holy Spirit as “it.” Refer to the Holy Spirit as Him. Jesus said, “He will teach you all things” (John 14:26). You wouldn’t say of a person, “It wore a maroon tie.” You’d say, “He did.” Don’t depersonalize the Holy Spirit. Don’t think of being filled with the Spirit as if you are a vessel and the Holy Spirit is a liquid, or as if you are a battery and the Holy Spirit an electrical charge. No, the Spirit is a Person, and you are a temple.
Make a list of qualities of the Holy Spirit that you have learned from Scripture. Research these as needed but seek to remember that He is a person, and you are His temple.