Last night there was a guest speaker at the UPC church. He was talking about how he is a missionary and that he's going to be going to a convention overseas that has "50 trinitarian pastors" at it and he was talking about how glorious it is. I found his reference to "TRINITARIAN pastors" interesting. I was very surprised to hear him say that because I've been told they don't agree with trinitarians. I have not asked any of the members about the UPC beliefs because I'm nervous about being condemned. I'm not interested in membership anyway, I just want to worship the Lord.
I think you should figure out your beliefs ahead of time because the Trinitarian church is very strong Biblically.
To not be a Trinitarian when the Bible speaks so much about the Father, Son and Holy Spirit, even baptizing in the name of the Father, Son and Holy Spirit.
Don't take this wrong, but you need to seek the truth of whether the Trinity is true and supported in the Bible, which it is and then make a choice. I'm not sure that going back and forth between the Trinitarian AOG and the UPC makes sense as far as your belief, which I think you need to research and understand and then move forward from there.
You might want to visit the UPC website to familiarize yourself with their actual beliefs more, because I don't know that you'll get a straight answer from them because being a non-Trinitarian is very close to being considered a cult. And many consider the UPC a cult or very close to a cult.
I do not want to see you walk into error. God is more important than the worship at any church.
Kind of dangerous theologically. And they will (UPC) try to convince you their few verses pulled out of context are Biblical, but they don't hold water when one has studied, so I recommend you study for yourself and not concentrate so much on worship, because being led to bad theology takes years to work out. Better to begin in truth and move forward from there, you will find a dazzling church in which to worship. Don't worry.
Also, think about the fact that they believe every other Christian church and it's members are going to H E double toothpick but them. That should be a huge warning to you. No church has a lock on Christ and if they think that they do, than that is worrisome in it's own self righteousness.
And they will try to pull you away from your family, because or if they are non-believers and even other Christians because they believe they are not going to heaven anyway.
It's a slippery, slippery slope.
Those are my thoughts.