Look at ancient manuscripts online at:
http://www.csntm.org/Manuscript
If you want to see some English translations from centuries past:
https://www.originalbibles.com/geneva-bible-1569/
http://textusreceptusbibles.com/Parallel/43014001/KJV1611/COV/WYC
This link has great resources including comparison of published Greek texts, interlinear Greek with English, explanation of Greek words, grammar, and usage:
https://biblehub.com/
Here are some really good youtube videos with short interviews with Bible translators:
https://www.youtube.com/watch?v=yZSHztdJ6tw
https://www.youtube.com/watch?v=EwrxWIgNYZQ
https://www.youtube.com/watch?v=NFuCS4YAJ3g
https://www.youtube.com/watch?v=4kfs1_0LlZA