Tips on how to make ice cream at home?

You can also make it with ziplock baggies. after you've blent the ice cream like the above recipe says pour it into a quart bag, squeeze out the air, and seal it. then put it inside another quart bag and seal it tight again, then put the whole thing inside a bigger bag and pour in ice around the loose spaces. top it off with some salt to help quicken the freezing process. seal the bag and shake it up for about 10 minutes with your hands. the moe you shake it the smoother and creamier the icecream will be.

If you don't have a churning machine, you can make super simple ice cream at home using sweetened condensed milk. It's fun to do with kids, too! Just put 1 can (14 oz) of sweetened condensed milk, 1 pint of heavy cream (2 cups), 2 tsp vanilla extract (or another flavor if you want), and about 1/4 tsp of salt in a blender. Blend it until it's mixed, put it in a container, and pop it in the freezer for abotu 5 hours. Scoop and add your toppings when you're ready to eat it—we like to add fudge and a cherry on top!

I don't have anything to contribute that hasn't already been said except to say that one of the biggest perks of making ice cream yourself is getting to try cool and weird flavors that they'd never sell in the store, like wasabi or bacon or (my personal favorite right now) cereal milk (specifically Froot Loops). Super fun and tasty way to be creative.

Do you think I could substitute nondairy milk pretty easily?

I think yes, but it'd probably depend on the milk, i.e. almond milk might be a tad thin but I imagine a full-fat coconut milk would be awesome. You could probably thicken up the almond milk with a banana or an egg yolk (unless you are vegan).