HI
The coffees at a coffee shop are pretty much the same ideas.
But to start with the most basic drinks: Latte - it's just espresso and steamed milk. Cappuccino is espresso, steamed milk with an inch or two of foam (from the steamed milk)
So after that - a mocha is chocolate syrup, espresso, and steamed milk (topped with whip cream) - Vanilla latte - latte w/ vanilla syrup (same as carmel, hazelnut, etc).
Breve is steamed 1/2 & 1/2 and espresso.
Macchiato is a layered drink - vanilla syrup, steamed milk, foam, espresso on the top (and carmel drizzle if it's a carmel macchiato).
So - IMO I would say stay away from coffee (and caffeine) because 1) expensive 2) yes it is addictive (therefore more expensive) 3) imo - it's just not that great for you.
If you are worried about calories - you'd have to order the coffee drinks skim, SF (then you get aspartime), and to be caffeine free - decafe. After that - what's the point?
You'd think I had worked at a coffee shop before.......
The other suggestions - cider, steamer, chai (with soy!! YUM), are great options. Next time I see you we'll go to a coffee shop and make you try a chai.