I feel like being openly gay kind of acts as a "justification" for when people find out about me liking Sailor Moon, though it's hardly an issue nowadays since most of my friends like anime and they all at the very least appreciate Sailor Moon if they're not fans themselves. I can't imagine being straight and having to own up to liking Sailor Moon. At the same time, I present as a typically masculine dude so I can't always rely on the "oh, well it's okay because he's gay" thing because that itself comes into question for some people I meet.
That said, though...in the famous words of RuPaul: what other people think of you is none of your business.
They might think you're weird and they might think you're homosexual. So what? It's not your business what they think of you, and if they care enough to share their opinion of you, just remember that it's their opinion (and it's most likely an ill-informed one) and it has no bearing on you whatsoever unless you choose to give it significance. Easier said than done, I know.
Here's a helpful tip: to most people in this world that you will meet, like co-workers and random friends, it (for the most part) matters less what you own and what you do; instead, it matters more how you PRESENT this information to them, which reflects your RELATIONSHIP with your own hobbies. It's one thing to say "lol yeah I go to anime cons, I kinda get crazy and out-there, I've actually cosplayed as Sailor Mercury and it's always a crazy hoot for everyone involved" and another to say "I like to dress up in a tiny blue skirt and put on a wig in large public forums where fellow nerds spend lots of money." It's likewise one thing to say "yeah, I'm into Sailor Moon, I'm a big-time fan from way back, it's a thing" and another to say "OMG yes I love Sailor Moon, I can name the title of every episode, I watch it every day, omg omg omg..."
Just present yourself as normal with a few quirky interests (even then, they're honestly not that quirky) and present your own relationship with your hobbies as one that is healthy and well-adjusted, and people will pick up on that about you. Just judging from your words above, you seem almost ashamed or disappointed by your interest in Sailor Moon and it might be possible that people pick up on your shame or feelings of needing to be seen as normal when you talk about SM. Just an idea.