Keep your eyes on the prize. I know 2 1/2 years seems like so far away but you can make it. Anytime you start to doubt yourself, come back for a pep talk. You can research some colleges for inspiration, especially the schools that offer automatic and competitive scholarships and fight for the stats that can get you an automatic scholarship. Look at schools that meet full need.
If the porn you found involves children, then you should to talk to someone. If not, trust you gut instincts. Stay safe.