It really is empowering to make it with tools you already have like a shovel. When I first learned of the concept of pits for biochar, I was hooked.

As for direct application, it depends on your soil. I would recommend charging it before adding it, either by mixing it with compost for a while or by making a compost tea and soaking the biochar (you need much less compost for this method). Best of luck in your biochar journey