How do I know if I'm a good singer or not?

When I sing I think I sound good and have a nice voice, but I'm
worried that I might be tone death or something and actually sound
horrible.

I keep recording myself on my phone but my voice sounds wonky and
weird I don't know if it is the phone (which was quite cheap) or my
voice.. because it doesn't sound like that when I sing..

Are there any ways of seeing if your good or not when you sing? I
don't wan't to post the voice thingy online because my voice sounds
wonky and it sounds like I'm singing out of my nose..