I'm not sure what exactly you're having troubles with, but some events take a few in-game days to trigger so you might have to skip a couple of days to trigger them. You also need to do them in a specific order.
This is the sequence of orders given in your walkthrough
Check your phone, there is a message from Jackie.
➢ At the afternoon check the bathroom to see Melissa.
➢ Go to the kitchen, and help Melissa baking. You need to add 1 milk, 2 egg, 1 sprinkles and 3 chocolate then stir 4 times. [Unlock Melissa event #8 & Melissa progress #9]
I got a message from Jackie and after reading that I went to map to forward time to try to get this scene "At the afternoon check the bathroom to see Melissa" There is no one in the bathroom in the afternoon. Then again for the next event of baking I had to forward time and then in taht also you mentioned "You need to add 1 milk, 2 egg, 1 sprinkles and 3 chocolate then stir 4 times." Here also I am getting an issue in the sense that before adding 1 milk I am getting a screen where there are three options of Chocolate, strawberry, and vanilla. Until and unless I click them I cannot add 1 milk, but according to your walkthrough there should be nothing added before 1 milk. I am attaching that file for your reference (baking one)
