I'm sure you're going to do marvellous, darling! Why wouldn't you? You're talented and motivated and, pairing or universe aside, when you love your characters, that usually comes through in your writing. I'm wishing you luck, because tackling a new fandom usually pulls behind all other challenges (like knowing canon really well) so it's not to just be shrugged off lightly!
Oh, to give you something to laugh about: when I first read your tags (in my e-mail notification), I read frostiron like frosti-ron - and I was like: why would be Nia writing about a frosty Ron?! LOL, I just can't get out of my own head! :D
Hugs darling, I've got full trust in your abilities. Please let me know when it's done so I can read it!