helpmeownlife

Hey guys. I have an idea in mind, although, I've never really had much experience in fitness and stuff so I've come looking for help. Currently, I weight 140, measure in a 5ft 5, and I'm 15. I'm at a healthy weight, but not a...'sexy weight' I guess. I want to lose the extra unattractive weight I have, and get as toned as I can by my deadline. I'd like to accomplish this by mid-summer, which is about 6 months...I'm going to guess and say that's very possible, but there's another thing. I don't really want any big changes to show until the summer starts. That probably sounds weird, but I would like to pull off a lot of changes over the summer, this being one, rather than over the final half of the current school year. Is there a way I could get some muscle now, and lose the weight and get extreme when the summer starts? I'm probably going to have tons of free time (I even do now), so...what cardio and work outs should I do, and when? I'm hoping this is an obtainable goal, what do you guys think?