Just stop and think about how many "singers" can't sing at all... start with Mick Jagger. Move to Rod Stewart. God, Stewart's voice is like nails on a blackboard. That screaming quality.... Whole bunch of people got famous because of the band behind them without being able to sing. That first take was better than a lot of people I hear right now.

You have ZERO to worry about. As you practice and improve from a very good starting point, it'll all work out.