Here the word "us" refers to the apostles and does not include the audience to whom Peter is speaking. (See: [[rc://en/ta/man/translate/figs-exclusive]])
Going in and out among a group of people is a metaphor for openly being part of that group. AT: "the Lord Jesus lived among us" (See: [[rc://en/ta/man/translate/figs-idiom]])
# beginning from the baptism of John
The noun "baptism" can be translated as a verb. Possible meanings: 1) "beginning from when John baptized Jesus" or 2) "beginning from when John baptized people" (See: [[rc://en/ta/man/translate/figs-abstractnouns]])
# to the day that he was taken up from us
This can be stated in active form. AT: "until the day when Jesus left us and rose up to heaven" or "until the day that God took him up from us" (See: [[rc://en/ta/man/translate/figs-activepassive]])
# They put forward two men
Here the word "They" refers to all of the believers who were present. AT: "They proposed two men who fulfilled the requirements that Peter listed" (See: [[rc://en/ta/man/translate/figs-explicit]])
# Joseph called Barsabbas, who was also named Justus
This can be translated with an active form. AT: "Joseph, whom people also called Barsabbas and Justus" (See: [[rc://en/ta/man/translate/figs-activepassive]] and [[rc://en/ta/man/translate/translate-names]])