Jesus gives us faith and makes our faith perfect by causing us to reach our goal. Alternate translation: "creator and finisher of our faith" or "the one who enables us to have faith from beginning to end"
The joy that Jesus would experience is spoken of as if God the Father had placed it before him as a goal to reach. (See: [[rc://en/ta/man/jit/figs-metaphor]])
To sit at the "right hand of God" is a symbolic action of receiving great honor and authority from God. See how you translated a similar phrase in [Hebrews 1:3](../01/03.md). Alternate translation: "sat down at the place of honor and authority beside the throne of God" (See: [[rc://en/ta/man/jit/translate-symaction]])