Its the hot beverages that are not recommended due to the warping possibilities. If you use a straw with most soda's then you should be fine..When you are finished with your soda simply rinse them out with water. That way they are out of your mouth for only 30 seconds as opposed to 10 minutes...
Invisalign treatment was developed initially for adult orthodontics. I have treated 65 year old and people who are older than that have done so successfully. By straightening your teeth you are creating a more favorable environment in you mouth for maintaining healthy gum. ...
From what I can see in the photo it appears that your arch is fairly narrow,so by widening them with Invisalign the space needed to move the tooth will be created. You are young so the tooth movement will be easier now than later in life. Invisalign teen would be the treatment of choice for you.