Saul (Paul) was struck blind when he encountered Jesus on the road to Damascus .He then holed up, waiting for deliverance .This also give him time to reflect while being dependent on people..Previously Saul was an arrogant ,self righteous Pharisee ,going around persecuting Christ followers.
Ananias(believer) was tasked by God ,to connect with Saul, to heal and baptise him,welcoming Paul into the community of Christ followers .Also through this way ,Ananias would become Paul 's first witness of his conversion and could vouch for Paul as a true convert when they returned to the Christian community in Damascus and began preaching to the Jews that Jesus is the Son of God.
Ananias argued with God when given the task to visit Saul ,due to Saul 's notorious reputation as a persecutor of Christ followers with authority from the chief priests to arrest them .He was afraid for his safety and was unsure if Saul had truly accepted Christ as his Lord .It took him courage to obey God in this case.
Ananias obeyed God in the end and went to the house ; he laid hands on Saul saying ,"Brother Saul,the Lord- Jesus ,who appeared to you on the road as you were coming here -has sent me so that you may see again and be filled with the Holy Spirit .Saul regained his sight ,got up and was baptized .
It would be very hard to go up to strangers and give a prophetic word of wisdom or to share the gospel with strangers .I haven't done this successfully yet .
It would be easier to do that with people I know eg ,to encourage or give advice as in fellowship group .
And it would become easier when one has a closer walk with Christ .