Record yourself and listen to it. Do you think it sounds good??? That's how you know.
^^^^^Ultimately, you have to be honest. Do you like what you hear ?
If you have to ask then the answer is probably no
There's alot of truth in this actually.
I remember some 27 years ago, I'd just become a part of this church. Now, for the previous 8~9 years, I hadn't sung. I used to say that a combination of my voice breaking and smoking {anything that would catch fire} had ruined the choirboy voice that I'd had up to the age of 11. I used to wish in my head that I 'could sing'. Anyway, in this church, they asked me if I could sing and I said 'not really'. but they said well, just sing us something anyway.
So I did. They were all gobsmacked and they said my voice was lovely. I didn't think so and I don't think so now but I realized that deep deep down, I must've thought that I could at least sing a bit and keep in tune because there is no way at all ever that I would've sung in public if I didn't think I could. Embarrassing myself publically is just not my thing. I could never be a clown or a politician.
Anyway, that was the start of my rennaissence as someone that can sing. I may get a little flat on occasion, but I know I can sing. I'm not great, it's debatable whether I'm even good, but no one I've ever heard sounds like me. I honestly don't need anyone to tell me whether I can sing. And truth be told, I didn't back in '85 either.
Paradoxically,
it was important to hear it though.
I'd say if you can stand to listen to yourself sing and you enjoy singing then you should continue to sing. Now John Lennon HATED his voice, but the guy had something to say so he said it.
Lennon's dislike of his voice wasn't centred around whether or not he could sing or hold a tune. He knew
absolutely having been a choirboy and singing live rock'n'roll and skiffle from the age of 16 that he could sing. In fact, it's quite interesting that you only hear of Lennon wanting the sound of his voice being altered from about "Revolver" {1966} onwards when there was suddenly a range of things that could be done to the voice to make it sound different. Prior to that, he liked double tracking. During "Pepper", he always had lots of 'echo' in his phones. At one point, he tried singing into a mic covered in a plastic bag suspended in water. During the White album, he experimented with singing lying on the floor. If you put it in the context of the Beatles in general never wanting to repeat themselves, having already done something, while experimenting with any and every little thing, it makes sense.