If you are looking to adopt Christianity as the first century believers did, so am I and I’ve been on this path for over 20 years. These beliefs and hundreds of hours of video and written teachings can be found here. https://firstcenturychristianity.net/about-us/
• Some key points of doctrine, in no particular order:
Works matter. If your faith doesn’t produce both a mental and physical change then keep working.
• The early church stopped pagan practices and adopted the worship outlined in scripture. They stopped observing pagan high days, they stopped worshiping false gods, idols, and dead people, and they attended synagogue where they learned Torah. Our worship and faith follow this pattern.
• The Sabbath is for all mankind to follow and is an identifying mark of God’s people. It’s from sundown Friday to sundown Saturday. Anything else is not from Yahweh (God).
• Scripture is the 66 book bible. It’s best represented in the NASB95. The New Testament (NT) was written in Greek. If there was any original NT scripture in Hebrew, we do not have it.
• The Septuagint is the Hebrew Bible in Greek that was made ~150 years before Christ. This is the basis for having a bible at all. This is almost assuredly the bible of the first century synagogue and what the apostles cited. This is available in English today in the Brenton translation and is a great resource.
• The Septuagint is where the word Christ was chosen for the word Messiah. There is nothing wrong with using this word to refer to Jesus of Nazareth aka Yeshua the Son of God. Calling oneself a Christian means the same thing as calling oneself a Messianic. Both terms mean “follower of God’s Anointed One” i.e., Yeshua.
• The Masoretic Text is the Hebrew Bible. It dates to about 900 AD (after Christ) and is the authoritative Hebrew text of the bible.
• The Aramaic OT, called Targums, is not authoritative and is Rabbinic literature.
• How you pronounce the names Yahweh (God) and Yeshua (Jesus) matter. Some pronunciations are just fine. Others are not and change the meaning of these Names. Yahweh, written YVHV, means “self existent One”. Yeshua means “Salvation”. Be sure however you pronounce these Names that you aren’t accidentally changing the meaning.
• Paul is an Apostle who was called to spread the Gospel to the Roman empire.