Indeed, Red Reishi (or Mikei red Reishi as it is usually called) is a mushroom, a very red one as it happens. Traditionally it has been taken for the many it brings which allows you to be traced back to approximately 2700 Y simply.C in China and Japan. It has been a staple of Chinese herbal medicine ever since these periods. Actually, it is said in Japanese history books how the reason the Mandarin aristocracy health benefits of ryze mushroom coffee (information from wiki.team-glisto.com) period were so healthy is that they'd access to and regularly ate Red Reishi.
You will require spawn start out a society. There are two ways you will get it. You can make your own using a sterile culture or you can purchase ready-to-use spawn from a supplier. The sterile-culture method can be cheaper in the long run, but there are much of expensive start-up costs, so itrrrs likely buying spawn is your best bet when you're starting from a budget.
I am speaking from experience because I did some jumping myself.