Well keep it up and you'll get where you want to be. I was almost 200lbs at the end of high school and now I'm on the varsity lightweight (<160lbs) rowing team at my university.
Since you're just starting I'll give you a bit of advice:
1) DON'T NEGLECT CARDIO, it's the best way to lose weight through exercise, and you only burn more calories the better you get. I can burn over 1000Cal in one workout, that's more than half what lots of people eat in a day. If you want to lose weight do cardio.
2) Work your core. Whether you're fit or not, core work will help any fitness goals you have. Your core is the center of all your power, everything works around it so if it's not strong, everything else will be weaker. Some basic core workouts are sit ups/crunches, front plank, side plank, leg lifts and back extensions. There are so many ways to work your core, all you have to do is type it into google and you'll get plenty. Another great exercise that works your core is the overhead squat, but that's a pretty advanced workout for you right now.
3) Don't neglect any part of your body, ESPECIALLY YOUR LEGS. It may be tempting to work mainly your glamor muscles (chest, arms, shoulders, back) because they grow quickly and they're the most visible but have you ever seen a guy with big arms and nothing else? Looks pretty funny eh. You will look a lot more solid with slightly smaller arms but a well proportioned body than if you're lacking somewhere, you'll also be better suited for most sports. One thing I can say about your leg workouts is squat, squat, squat. Squats are the best leg exercises and there are a lot to choose from. Start with the typical back squat, once you've got that technique down, try doing front squats. You'll probably find them harder and you won't be able to lift as much weight but it's worth it, they require more stability so you recruit more muscles, mainly from your core stabilizers. Once you're good at those and if you're feeling a bit adventurous, try overhead squats. As I said before they're the ultimate squat, they require so much more stability because you're holding the bar over your head, and they will work muscles all over your body.
4) The last thing I'm going to say is don't hurt yourself. Get someone with lots of experience, a personal trainer is good if you've got the money, to show you the ropes. It's easy to hurt yourself with bad form, I once hurt my back doing cleans and it took over 2 months to completely heal, so learn proper technique and don't overdo it with weight, it's better to lift less properly than lift more poorly. Do your research and take what that roid monkey beside you is telling you with a grain of salt. I've seen a lot of really big people lift really badly, so try to get someone who really knows what they're doing, not just the biggest guy in the gym, to tell you what to do.