100% agreeing with @arxianfall on this.
I've been writing since I was in second grade, trying to show it to anyone who would pay attention, and while at first I was incredibly eager to show people anything I did, at some point after college I developed crippling imposter syndrome to go along with previously unaddressed depression and anxiety.
No one cares was the worst thing I could thing of. After medication and therapy, I found out I could use it as a protective mantra. If no one cares, there's no reason to hide in shame. If no one cares, there's no reason to not write to amuse myself. If no one cares, I'm not hurting anyone by sharing with anyone who cares to listen.
No one cares is tough because if you're someone who thrives on feedback and people finding joy in your work, it stings a lot. But, there's no reason to not try to pull a judo throw on a traitorous brain and use no one cares as justification for sharing it with anyone and everyone.
Besides, I guarantee there's someone who is ragingly mediocre screaming how awesome they are at the top of their lungs (statistics say it's a rude middle-aged white guy) and getting in people's faces in non-socially distant ways. In the face of that, try not to ever feel like you don't deserve to share what you're proud of.