A good book on the topic of Jesus as Son of God among the early Christians is King and Messiah as Son of God: Divine, Human and Angelic Figures in Biblical and Related Literature by Adela Yarbro Collins and John J. Collins. The authors are among the most senior Bible scholars alive, having served as past presidents of the Society of New Testament Studies and the Society of Biblical Literature.
https://www.amazon.com/King-Messiah-Son-God-Literature/dp/0802807720/
Bringing together the evidence from the Gospel of John and Revelation in particular, it concludes:
“Both authors associate Jesus with the wisdom tradition. The Gospel identifies personified wisdom with the word of God as the philosophical logos. Revelation does not go in that direction. It depicts Jesus as “the beginning of the creation of God” in 3:14, which recalls the Greek version of Prov 8:22, “The LORD created me as the beginning of his ways for his works.” Although they do not allude specifically to texts about wisdom, certain ambiguous sayings of the risen Jesus in Revelation are best understood in relation to personified wisdom. He affirms that he is the first and the last, the alpha and the omega, and the beginning and the end (1:17; 22:13). In light of the evidence that the author of Revelation portrays Jesus as the heavenly messiah who is also the principal angel of God, these sayings are best interpreted as associating Jesus with personified wisdom as God’s first creature. Although some elements of these sayings are also attributed to God, it is unlikely that the author intends to identify Christ with God. Rather, the common affirmations signify that Christ participated in creation and will participate in the full manifestation of the rule of God as God’s agent. The Gospel and Revelation both present Jesus as preexistent and as divine in some sense. In the Gospel he is either and emanation of God, or God’s first creature, namely, the only-begotten god. In Revelation, the evidence suggests that he is God’s first creature, namely, the principal angel.” (Page 203)