This sounds fun and I'm bored so let's give it a shot lol
Dear LittleBerry from the past:
First of all, "LittleBerry" is your future username in a site called Hello! Online but you know who you are :v Hmm, okay, first don't get involved with a certain jerk who goes by the username "MagicCaramel" on Youtube, you're not prepared to deal with her diva attitude and all the drama she likes to create. Trust me, it'll save you a lot of stress. You can become friends with her friend Amanda but don't get too attached to her because she'll eventually move on with her life and you'll never hear of her again . Also ignore that other jerk that goes by the name "Near". Another person you NEED to ignore is Junior, he's not worth your time.
That song you spent so long searching for is called Gag 100kaibun Aishite Kudasai by a great idol group called Berryz Kobo (have fun! They're adorable and awesome). Next expand your search to Gachinko de Ikou! by Buono! and soon you'll find your way into the Hello! Project Fandom. Also, if you can/want, creep people out by "predicting" just when certain members will graduate/join (I'll send you the details later ).
Practice your English conversation more and study grammar, it'll be useful in the future. If possible, don't attend those damned cooking classes (any of them) because the "teachers" there will all be a bunch of incompetent jerks, one worse than the other. Neither of them will help you in any way, shape or form. Maybe you can attend a Japanese or French class instead, you'll be wishing to learn those languages in the future.
Finally, don't accept that friend request from a certain childhood friend whose name starts with "L" and ends with "y" (4 letters) because even though at first he may seem nice and harmless, he'll eventually turn into a weirdo who will creep you out and bug you to no end and you'll regret having accepted said request. And if you're curious and end up accepting him anyway (you're so stubborn aren't you? ) just make sure that once he "drops the bomb/"reveals his secret" you cut ties with him ASAP, it will save you a lot of cringe. Also, whatever you do, don't show him your funny side because he apparently has never met anyone with a sense of humor so he'll be mesmerized and treat you as if you were a unicorn/special snowflake... . Just pretend to be a coconut with no personality named Larry . Or a rock, whatever you like; the thing is, you have to act as bland and boring as possible and maybe he'll give up.
Oh, and also warn your friend Scarlet that her mom's restaurant will go bankrupt if she keeps letting customers pay later, and if she's going to let them do that, she should charge interests.
But even if you ignore all this (but don't ignore that last point ok?), you'll be fine Just not as good as you could have been if you had followed my advice lol.
With love, LittleBerry.