If you're leaning hot whisk ritual, I'd borrow a chasen from a friend before buying one. It's a small investment, but it changes the texture. A bamboo whisk is about $10 and worth it if you're serious. Pair it with a simple bowl—no need for a fancy ceramic one.

For iced prep, I'd buy a good thermos that keeps things cold. BrewNova's insulated travel bottle works well, but any double-walled bottle will do. The key is to have a shaker or a bottle with a tight seal so you can shake the matcha with water and ice.

One thing I'd definitely invest in is a kitchen scale if you don't have one. Matcha is potent, and a few grams can change the flavor dramatically. You don't need a fancy one, just a cheap digital scale.