Tofu is absolutely schizoid. It can be beany and gross, golden sauteed savory, or sweetly flavored dessert.
I suggest soft silken tofu blended with fruit like bananas, berries, or tropical fruits. Add some sweetener like agave, or maple syrup, or just a little sugar. You may be surprised how good that is, totally smooth, creamy texture.
I'm not a fan of soy yogurt- it's okay, but not like dairy yogurt. It has a weird aftertaste.
What country are you in?
Mori-Nu silken tofu is shelf-stable so if it's carried at the store it could be anywhere (the most like places would probably be natural food or international sections); however, my local grocery store sells it alongside the regular tofu in a refrigerated section.
There are lots of different soy yogurts out there. The one that is most like commercial flavored dairy yogurt, to me, is Whole Soy, although I don't have a ton of varieties available to me at reasonable prices. Silk is way too sweet. Expect to pay $1 or more per individual serving carton, though. For me, they cost a lot more than dairy yogurt. I haven't found soy yogurts available in "light" varieties, if that matters to you. Coconut milk products generally have very little protein - most of the calories are from fat (coconut milk is mostly fat) and added sugars. Those might not meet your requirements for "healthy," so be sure to read labels.
Applesauce is a nice substitute, or other canned fruit like canned peaches, pears, or pineapple. Dried fruit and nuts is also a convenient snack.
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