Since you believe that Jesus is the first-born of all God's creatures, then the discussion around Baptism is not on the efficacy of this but rather on whether it is the Trinitarian formula or not.
That is quite a different discussion from something that a Baptist or Anglican would discuss on, correct?
C, second century Christian apologetics are uniformly suboridnaitonalist in their beliefs, that is, the Son is subordinate to the Father, and only marginally triniatrian. That is to say, the early Christian trinitarianism is not the same as that of the First two Ecumenical Councils, developed 2 centuries later.
In fact, the wide-spread variation on this subject was the subject and the reason for the convening of the First Nicene Council in 325 AD.
The Second and third century apologetics (incluing Eusebius up to the First Council) spoke of the Father, Son and Holy Ghost but not as co-equal, and in many cases as not co-eternal. In fact, the Holy Ghost is mentioned very rarely as God, but more as the power of God (which is closer to what Judaism teaches).