This app was mentioned in 3 comments, with an average of 2.67 upvotes
If you have an Android phone, try the GOdroid app. Play it with the lowest AI setting and on a 9x9 grid. Games will only take a couple of minutes so it won't take too long before you recognize what to do in order to win a game. Might still take a fair number of attempts though. ;)
For DDK level GnuGo is a very good opponent. Android implementation I like the most: https://play.google.com/store/apps/details?id=de.agrothe.go (it can play not only on 9x9 but on 13x13 and 19x19 as well).