re: “The Holy Spirit is not a person.”
The New Testament teaches that the Holy Spirit can:
1. Be grieved. (Ephesians 4:30)
2. Be lied to. (Acts 5:3
3. He teaches. (John 14:26)
4. Speak. (Acts 8:29)
5. Searches everything and knows God’s thoughts. (1 Corinthians 2:10-11)
6. He apportions spiritual gifts. (1 Corinthians 12:11)
7. He intercedes for us. (Romans 8:26-27)
8. He (as the Helper sent by Jesus) will convict the world of sin, of righteousness, and of judgement. (John 16:7-9)
There are others, but it seems clear that the Holy Spirit acts, speaks, can be grieved, teaches, etc. He is a Person and Co-Equal with the Father and the Son.
That is not a “person.”
That is a Spirit.