Hi Sarah, welcome
i've just finished my first week. I started on Saturday so i can have two days of being in bed because i knew i would feel weak and cranky, but hopefully you'll be fine from Tuesday onwards.
Im having my first shake at around 11, second at around 4 and third at around 8 because if i have it to early, ill have too many gaps in between and that will make me go bananas so maybe this method of taking them will help you too. The shakes will keep you full for a couple of hours with drinking lots of water aswell. Have your shake within the 15 minutes and i sip it slowly through a straw which usually takes me around 8 minutes, and i find that if i put in more water than the recommended 240ml it tastes nicer but it depends on individual taste.
You can mix coffee with the vanilla shake for a latte or a frappuccino (with crushed ice and blended with shake) or chocolate shake with coffee for a mocha or mochaccino. You can have sweeteners but only in tablet form, and can have herbal teas such as peppermint tea or green tea.
Once your in ketosis you wont feel hungry or be craving food as much and it takes a few days (depending on the person) to get into ketosis.
If you ever feel down or tempted to eat then use this forum as support, it really does help
Other than that i hope it goes well and im always here for support

good luck