Moving from Ryogoku to Harajuku! Can y’all help me out with restaurant, cafe, and gym recommendations?

I'll be moving to Harajuku next month. I've been there many times of course but haven't actually explored anything except the main shopping areas.

Can y'all help me out with some restaurants and cafes? Also anyone know of an affordable gym? Lastly any great grocery store or cool little shops would be nice too! Thanks!