Making a smaller curd cheesecake without the curd cheese!

I have two simple questions about the curd Cheesecake with Greek yogurt, honey and pistachios, please. I can't find curd cheese in my nearest supermarket. What else could I use?
Also, as we're currently in lockdown, I can't socialise with the number of people that might be necessary to enjoy this rather large cheesecake (serves 10-12). If I directly halve all the ingredients, will the cheesecake work just as well for 5-6 people? Thanks.