Back to the roots kits are simple and easy. Amazon has one on sale for $13. That is how I got started. You of course can go bigger or better, but starting small is often the best way.
Different product: I got this one as a present and it worked great. My impression was that the
It took longer than ten days, but produced very delicious and big mushrooms. They came out both the front and the top. They were advertised as coming out the side but honestly the unintended top growth was better. I do think that I will try again, but have not yet. My impression is that the spores are mixed throughout the matrix of soil, or at least coating the entire surface, and so I am going to try to remove it from the box and grow the mushrooms in trays instead.
They grew in my kitchen on the counter, with minimal attention.