The Son's soul/person had a beginning, His Spirit did not.
You're just making stuff up.
The Holy Spirit is Jesus' Spirit as the apostles taught.
The whole Bible teaches that Messiah is the Spirit (2 Cor 3:17, Rom 8:9, 1 Cor 15:45, Ps 33:6, 2 Sam 23:2, Lam 4:20).
The Holy Spirit is Jesus’ Spirit, which is the Father’s Spirit in His Son,
Christ is the Spirit. Which is the Father's Spirit in us.