1. When I don't have almond milk, I use a combination of full fat coconut milk and water because canned coconut milk is a staple in our kitchen, though if you wanted to sub out the coconut milk, just replace that amount with whichever milk you're using instead.
2. I love using dates as my sweetener in smoothies, but you can also use honey or any other sweetener you prefer. Add to taste.
3. I own a Vitamix, which is pretty powerful at blending. If using a regular blender, you may need to roughly chop the ingredients and pause the blending occasionally to scrape down the sides.