The Easy computer plays legal moves with a light preference for good ones, and it sometimes overlooks an extra turn or a capture. That makes it the right opponent while the rules are still settling in: you can experiment with sowing counts and see consequences without being punished for every slip.
Once you win a few games in a row, step up to Medium — it starts defending its pits and racing you to the store. If you want a refresher first, the how-to-play guide walks through captures and extra turns with examples.