Since you’re keen to tell your mom, try to prepare what you want to say before talking to her. For example, you might want to explain to her what a furry is and what it means for you to be a part of the furry subculture. Be ready to answer any questions she might have, like whether it’s a safe subculture to be a part of and what costs are involved. You can offer to show her images of other furries and explain how you’ll use your own skills to make a fursuit to save money, and so on, in case she has concerns.