M5 Stick C plus2 modules

Hi, I'm planning to buy a new M5 Stick and need advice on which modules to get for optimal performance. I prefer not to purchase from platforms like AliExpress, Temu, or other Chinese sites—ideally, I'd like to shop at BerryBase or the M5Stack website.

Additionally, if I get more than one module, how do I connect them? Do I need something like a board to link them together?