The Bible is written in a straightforward manner for all to read. God doesn’t hide His plan of salvation from people so that it can only be revealed through the pope or a priest.
If that’s the case no need for the Great Commission.
btw...I’m on my second semester of Greek, so yes, you can read the Bible in the original language. When you do you really gain insight to the meanings of the texts.
Thank you and good luck in your studies and your analysis of the Scriptures.