There are plenty of resources available in terms of financial aid (FAFSA is a good start), but you will have to write a lot of letters/essays and do a lot of searching. How were your grades in school? That'll be a significant factor in being able to qualify for scholarships. I would think that having been out of school for a year might be factored into whether or not some entities will award you anything, but I may be wrong on that.
Better to do the work to find some aid now than to pay later. Were there any subjects in high school that appealed to you? They could give you some insight on what major you should choose. But be sure of what your major will be and stick to it. Changing your mind will only make graduating a lot harder. Best to choose something you're in love with, if possible, because it does require a very intense commitment to tangle with all those courses, even if you're part-time.
--sd-7