Fitness plan help, please?

I just joined Goodlife fitness center(in canada) and i just went for my first time today.

im 15. and im going to try to eat healthy, and me and my mom go there 2-3 times a week for about 2 hours(sometimes more)
I plan on going to the tredmill(fast walking) for 30 minutes, the recumbent bike for 30 minutes and the Elliptical Trainer for also 30 minutes.
i'm 160 pounds and 5'6. I want to get toner and tighter before summer, do you think this will work? how much weight do you think i will weigh before summer?

For some reason, i want to push myself to the limit, i want to lose weight NOW, i always try to over exercise.
Will i look "skinner" or "slimmer" by the summer? I want to give up sometimes cause i always think i will look fat forever.
How big of a change before the summer?



thanks for your help!

ALSO: I have gym forth period this semester (starting monday) and im trying to to use my school bus so much, so i can walk home, its about a 30 minute walk going up a huge hill.

If you eat right too, you'll definitely lose fat. Thats a lot of good cardio so it sounds really good. I think you'll def. be slimmer by summer if you keep it up

make sure you burn more calories that you intake per day. Stay away from foods that are high in Saturated fat (i.e. Fast food, fried chicken, well fried anything). Greens are your friend. Complex carbs such as the one's that exist in pasta are ok, as they give you the energy you will need to work out later.