The pleasure of God is entirely bound up with Christ. We have to see this. We won't get an appreciation of what God appreciates if we're always looking at ourselves, looking for ways to use what natural abilities we have to make an offering to God. It's only by looking steadfastly on Jesus that we get something that is a suitable offering. The more we look at Jesus, the more we disappear in our own estimation, the more He grows in our appreciation until He fills our gaze completely and nothing of self remains. John the Baptist was an example of someone who had disappeared in his own estimation. When asked "Who art thou?" he answers, "I am the voice of one crying in the wilderness..." (John 1:22-23). He is nothing in his own eyes, just a voice. He had a full appreciation of "He who comes after me". He wouldn't've been indignant when his disciples left him to follow after Jesus. The humility and self-denial of John was no affectation. The consciousness of the peerless worth of Christ was all that he valued.
It's odd that your refutation of instruments in worship hinges on your understanding of the OT, yet you declare the Psalms and the INSTRUCTIONS therein concerning physical worship as now defunct.
God is the giver, and He gives His children abilities and skills with which to worship Him---physically. True worship of God involves the WHOLE person...not just the spirit.