I'm sure you will have a lot more fun with a tablet than drawing with your mouse!

I used a small Wacom Graphire 3 for 14 years, but the last years it was driving me crazy, as there are no new drivers for my Macbook and I used a workaround that didn't work that well. Since January I own an XP-Pen Artist 16 and I love it! If I had the money I would have bought a Wacom Cintiq, but the XP-Pen Artist was expensive enough (altough a lot cheaper than a Wacom). But it was worth its money and I also use it as a second monitor.