Highschool

You would have 2 years left instead of just 1.5 but the amount of classes you would take would be less classes. You would take around 4 classes if you have a 45 min. period or 2 classes if you have block scheduled. You can take the extra classes this summer to graduate with your class.

College
You have flexibility before you even go you can testing out of classes you took in highschool through clep and AP. college gives much more flexability:

• you choose your best format (online,electronic,hybrid, in class)
• your speed (10 wks. in quarter based schools, 15wks in semester based schools)
• Your class time
• class length (45 min. 3x a week., or 1.25 hrs 2x a week)
• Your teacher's
• Amount of classes 2-7 (full time financial Aid is 4 or more classes)
• year-round or not (split you financial aid appropriately)
• assignment breakdown (first day of class you are given a syllabus first day of class with all the assignments, quizzes and test days along with the percent that each section counts towards final grade. This makes it easier to prioritize.)
• student based tutoring

TRIO or SSS program
program that helps dis-advantaged students including disabled. provides:

• loaner books
• loaner calculators
• quiet study room
• teacher based tutoring
• counselors
• mid-term reports
• workshops

This is all w/o the disability office
disability office can provide things like

• Being considered a full time student even if you take less than 12 hours
• Extended time on placement test and class tests
• note takers- so you can have organized notes
• allowing tape recorders in class
• alternative testing locations
• books on tape
• special housing accommodation
• priority scheduling
• mediator between teacher and student for accommodation
• special seating

and many more....
I found college much more accommodating then high school because college's work for you.