Don’t use light coconut milk, it won’t turn out. It must be full fat because you’ll be whipping the solid cream. The best brands I’ve found with minimal junk ingredients in them are Native Forest, Whole Foods 365 brand, and Thai Kitchen.
You can use coconut whipped cream just like regular dairy whipped cream. It’s great as a topping on desserts, but also amazing over a simple bowl of fruit or pancakes. You can even spoon a bit on top of a pie or fruit crisp or stir some into a bowl of banana soft serve.
Any leftovers you have will last in the fridge for at least 1.5 weeks (probably longer) in a sealed container. It will firm up a bit more in the fridge. Simply scoop it into a bowl and re-whip it when you need it.