>>1151289No risk to it. Low levels of spore inhalation are never an issue unless you are exposed long-term. I work on a mushroom farm.
>>1151789There are a number of ways you can grow mushrooms. An easy divide to make is indoor and outdoor growing. Indoor techniques require more equipment and knowledge, but outdoor growing is basically free, and requires little to no knowledge. The tradeoff is time. Indoor growing can get you mushrooms in as little as three weeks, outdoor growing can take up to a year.
The log method you described is the simplest outdoor method for most people, and is a great way to get started. You can buy any number of species suited to every climate on earth (the poles outstanding).
Where are you located? Oyster mushrooms are failproof, and grow in all climates, you just have to pick the right time of year for inoculation. Lions mane, Shiitake, Laetiporus, Pleurotus, all are good species for a beginner and cover all temperate regions, unless you live in the tundra or a desert you're good to go.
If you are interested in indoor growing, or semi-indoor growing, just say so and I can gather up a bunch of relevant links.