I use the Ecowitt moisture sensors for potted plants. Given their size, I wouldn’t recommend using them for your lawn because you have to be sure to not hit them when mowing.
Automated irrigation systems are reasonably consistent. I moved from my lawnless apartment to a house with a backyard of grass. I left out a few empty containers across the lawn, waited for the first watering cycle, and adjusted the timings based on the distribution.
I take a very long-winded approach. I try to find a copy of the rules online, and then read through it (which is the first thing I would do if I had gone out to buy the game).
Then, instead of watching a review, I try to find a play through video to see how it plays out. The video isn’t completely devoid of colorful commentary or random banter, but it does give me a realistic expectation of how long the game truly takes.
I generally know whether I’d appreciate a game or hate it from reading the rule book. The video just saves me the cycle of buying, trying, and returning if I’m on the fence.