@blackswan_21006
Thank you! I really appreciate all of your comments.
Tips? I mean... I don't have that many, but I'll try:
1) Don't start publishing a story unless you know generally how you want it to end (otherwise you could end up leaving it unfinished). 2) Have a writing process that works for you, and stick to it - for instance, I found that I write my best scenes after everything else is done for the day, because then not a lot of things are on my mind. 3) Know your grammar. There are way too many fanfictions with a lack of grammar that makes my brain hurt. 4) Don't make characters too similar, otherwise it can get confusing (that almost happened with Pink and Blue).
I hope this all helps! Let me know when you start publishing your fanfic, because I'd love to read it. :)