I agree with you. It’s great fun to get immersed in various tea preparations and ceremonies. I do it whenever I can. Freshness is essential regardless of the grade of matcha you purchase. It should be a crazy vibrant green, not mossy or (gag) brown. How far in the middle of nowhere are you?
Other trustworthy brands are Aiya & AIO, that can both be procured on line. If you don’t drink a lot of it, stay away from the 100g bag. It will oxidize before you can enjoy all of it. Start with the cans, so you get the benefits so the freshness. Some companies like Rishi offer boxes of individual portions of matcha and maltodextrin or sugar to add to smoothies etc. That might be another choice for you.