If you do not have butter milk, then use ¾ cup yogurt + ¼ cup water, whisk it and use.
You can use chopped dry fruits instead of Tutti-Frutti or raisins or just skip it to make it without all these.
Do not add too much milk in glaze, otherwise it will be hard to set. If it’s thick, then warm up little bit in microwave, so it would be pourable.
Decorating cake is optional, you can skip it or décor it with your choice, like fresh chopped fruits or edible sprinkles, etc.