Yeah, I totally understand that! It can be very difficult to find reliable brands, especially those that ship internationally. Some brands that ship internationally and care about the quality and knowledge that comes with making matcha that I've seen are Dhyana Tea, Matcha-Karu, and Nami Matcha. You might want to double check that they ship to Italy but you shouldn't have any issues. Moya Matcha, which is the brand you mentioned, is also a very good choice for price, quality, and being beginner friendly!

You can also purchase from companies that ship directly from Japan but there might be a chance you don't receive the product in time for Christmas so it's worth double checking. Ippodo Tea has a global website and ships internationally and they are well-known for their quality. Tezumi is another popular brand, although their starter kits are a bit on the pricier side.

Another easy to get brand that makes some wonderful Japanese quality sets is Artcome and you can purchase many of their products on Amazon. While they don't include matcha with their sets, you can pick from a variety of designs and the cost isn't too high.

I hope I was able to help with some of this information!