A good place to start might be the diet threads. So many things work for so many different people, but that doesn't mean everything will work for you. A lot of it is personal preference as well.
Tons of people here simply count calories. There are lots of good sites with good tools for that - from Fit Plate to Spark People, you can often even get free apps so you can track on your phone.
Lots of free exercise options available as well. You can find videos for everything from cardio to strength training, and you can find strength training exercises that use your body weight if you can't afford equipment for your home. I have a free student membership, so I primarily use a gym, but I purchased the much-less expensive and versatile resistance bands for when I can't get to the gym. The fitness forums are particularly good about learning about these options. Look for the stickies at the top to get great archived information that tend to be particularly helpful for beginners in all the threads (though great for everyone as well).
Welcome! As I'm sure you'll quickly discover, 3FC is a great place to get needed advice and support (though it's relatively quiet around here compared to busier times like the first weeks of January).
Wedding challenge - 06/09/2015 - 08/09/2015
Biggest Loser Challenge (12/29 - 03/16) - Not successful. =(
Trainer boy challenge #3 (11/11-12/11):
Not successful. =(
(Trainer boy challenge #1 completed 09/11 - down 23.2 pounds - starting weight 239.8) (Trainer boy challenge #2 completed 11/11 - down 23.4 pounds - starting weight 216.6)