⋆˚࿔ japan 𝜗𝜚˚⋆

My dad decided that we might go to Japan next year on either March OR during Summer break (July-August) YAY. I THINK? I've been trying to learn basic Japanese and how to read hiragana and allat with this app called Busuu. I'm wondering if it's accurate or trustworthy since i picked it randomly.. CUZ IM NOT TOUCHING DUOLINGO. 
me and my dad watch a lot of Japan vlogs (MOSTLY TOKYO) and we're noting down any easy travel ideas or advice on the trip cuz.. there's ALOT of places to visit. We're mostly thinking of settling in Tokyo, Shibuya or Shinjaku for the trip!! 

Is one week enough? I HAVE NO IDEA AA but im hyped. I'm gonna lock in for studies so i can get good grades and head for holidays with a peace of mind :3<3