Very briefly, I would avoid the use of the word 'trinity' and phrases like 'three in one' and 'three persons' which are not found in the Bible.
Much more needs to be said as to why I wish to avoid these terms and others that are not found in the Bible. But for now this will have to suffice.
Hopefully I will be able to write more on this subject soon.
Here is another document that I found years ago giving evidence of very early tampering of the text of the Gospel of Matthew 28:19, the Great Commission. It shows that the words "the Father and of the son and of the Holy Spirit" were added. Originally it is likely that it had "in My name":
Trinity Added in the Great Commission