I'm new to this too. I've always been bi curious but have ignored it. It's not working out with guys anymore. But I don't even know where to begin with women. Maybe I'm a closet lesbian and have been supressing it. I'm happy to talk though if you want.
Nothing wrong with being shy. Just be careful. Many take bisexually negatively. It's harder than being gay in the dating world, so be very caustious dear and be prepared for lots of stupid. Don't let it get you down though. All of us bi-sexuals are in the same boat, dealing with idiots every day.