I believe basically the main belief is that the Holy Spirit works through believers, so worship should center around that. The idea is to wait for someone to receive from the Holy Spirit and say something. There is generally no singing unless it comes from the Spirit and no preaching and therefore no preacher. Also there tends to be a lack of ordinances since those tend to come more from institutionalized worship than Spirit worship.
There are eunuchs, fools , serpents or a combination of them going by the label Christians. All that is necessary has been revealed by Jesus 2000 years ago. Holy Spirit is primarily one of Truth. You refuse to heed to simple, direct commandments of Jesus and make up theologies to avoid doing what you have been commanded to do. Repent and walk perfectly. You make a mockery of Christ and Christianity.