20 lbs by June

If you're just getting started, you should take the time to read some of the forum's most helpful posts:

http://community.myfitnesspal.com/en/discussion/1296011/calorie-counting-101

http://community.myfitnesspal.com/en/discussion/10183824/things-i-had-to-unlearn-about-losing-weight

http://community.myfitnesspal.com/en/discussion/10012907/logging-accuracy-consistency-and-youre-probably-eating-more-than-you-think

http://community.myfitnesspal.com/en/discussion/1234699/logging-accurately-step-by-step-guide

More posts well worth your time here:

http://community.myfitnesspal.com/en/discussion/10300319/most-helpful-posts-general-diet-and-weight-loss-help-must-reads

Good luck!