Paul's life was turned upside down in
8 “ ‘Who are you, Lord?’ I asked.
Paul asked his 1st question.
“ ‘I am Jesus of Nazareth, whom you are persecuting,’ he replied. 9My companions saw the light, but they did not understand the voice of him who was speaking to me.
10“ ‘What shall I do, Lord?’ I asked.
Paul asked his 2nd question.
“ ‘Get up,’ the Lord said, ‘and go into Damascus. There you will be told all that you have been assigned to do.’ 11My companions led me by the hand into Damascus, because the brilliance of the light had blinded me.
Paul was struck and needed help. He was no longer in charge.
12“A man named Ananias came to see me. He was a devout observer of the law and highly respected by all the Jews living there. 13He stood beside me and said, ‘Brother Saul, receive your sight!’ And at that very moment I was able to see him.
Things were moving along and happening fast.
14“Then he said: ‘The God of our ancestors has chosen you to know his will and to see the Righteous One and to hear words from his mouth. 15You will be his witness to all people of what you have seen and heard.
Paul was told his purpose. All the while, Paul had been obedient to everybody.
16And now what are you waiting for?
This is a rhetorical question.
Get up, be baptized and wash your sins away, calling on his name.’
Paul obeyed immediately. Paul's life was turn upside down in this episode. His character changed. There were not any signs of resistance in these verses.
Why would the apostle Paul “delay” being baptized (Acts 22:16)?
He didn't. All the while he was helpless and just waiting for things to happen to him and he obeyed everyone. He was not in charge during this whole episode. He just followed along.