A few of my followers have actually bought collars from the Collar Factory and they all were very pleased with them with feel, fit, and durability.
If you think your collar is okay, be my guest at using it. In the end, I’m certainly not an expert at collars and if it works for you, that’s great. I’m only concerned that people will accidentally hurt themselves wearing collars not made for them.
Birds of a feather, my friend. You should consider finding people who are similar to your kintype and chat with them. They can really help you relieve stress while help you understand more about yourself. Kincyclopedia has a list of otherkin who are looking for friends and you might find someone of your kintype there!
As for your parents, tell them when you feel comfortable doing so. If you’re that concerned, don’t say anything and live life normally.
All that matters is what you’re comfortable with. It’s not unheard of for a rat and an owl to be friends and it’s definitely not uncommon for cats and dogs to be friends.
Just relax, doing some soul searching, and breathe. In the end, what other people think of you comes as a hard second to what you think about yourself. Don’t worry about other people and just focus on finding yourself. In the end, you could be all of them, some of them, or none of them. Just so long as you’re comfortable with it and identify with it.