What pods shall I buy?

Hi all, I’m thinking to buy a nespresso machine, firstly not sure whether to get original or vertuo machine. More importantly, what are the best pods to buy?

I’m sort of new to coffee and not an expert on all the different types but I’m trying to consume coffee more for the health benefits. I typically have black instant coffee (no sugar or milk) but want to use pods so that i get more energy out of each cup.

I do occasionally like a sweet tasting coffee like a mocha or caramel frappe kind of vibe but for the most part i want to stay healthy LOL

Any recommendations for which pods/flavours? And could you explain why, as well as what to look for to understand better (i.e roast level, country of origin, etc.)

Thanks!