Any tips for making a white mocha (hot) at home?

I bought an espresso machine yesterday (cheap Mr coffee) specifically for this drink. I tried it out last night and I tried this morning, and I cannot get it to taste even remotely similar to Starbucks.

Last night I used the steamer/frother on the machine to heat the milk and today I used the microwave.

This is the recipe I'm using. It seemed to be the most common one on Pinterest and Google. I'm using whole milk and no whip cream.

This is the espresso and chocolate sauce I'm using. Seemed to be the most recommended.

I keep playing around with it when it's done to try and make it taste right, adding more sauce or espresso, but I can't get it. What I'm making doesn't taste bad, it's just tastes like average homemade coffee.