I was willing to be homeless once. I was going through a very difficult time in life and had lost everything but my health and a place to live. I thought I would spend a night on the street and seek God's will for me. I was already a Christian. I just wanted to see what it was like to have nothing. There's more to the story, but the point is that I was sitting on some steps asking God what He wanted me to do with my life.
I was telling Him that if He wanted me to hike to Canada or Africa (I was in Florida at the time) I was willing to trust Him and leave right then and go. He showed me that I was where he wanted me to be - going through all these difficulties, so I went back home.
You claim to be on the street by God's will, and if that is true, then there is no safer place for you to be, and He has you there to reach people no one else can reach.
If I were out on the street (especially at my age now), I would fear that I wasn't where God wanted me and that I needed to hurry up and learn what He wanted me to so I could get out of that situation. But, He might also make it clear that that is where He wanted me. In which case, I would pray to follow His will in all things and seek to develop fellowship in a local church where they would accept me and my ministry.