Paul finishes telling what had happened to him in Damascus. He quotes what Ananias said to him. This is still part of his speech to the crowd in Jerusalem.
This question was asked to exhort Paul to be baptized. Alternate translation: "do not wait!" or "do not delay!" (See: [[rc://en/ta/man/jit/figs-rquestion]])
As washing one's body removes dirt, calling on the name of Jesus for forgiveness cleanses one's inner being from sin. Alternate translation: "ask forgiveness for your sins" (See: [[rc://en/ta/man/jit/figs-metaphor]])