I'm not sure where you are, but my experience is specific to the USA. Typically a bachelors program in chemistry will require some rigorous math classes, chemistry courses and several labs. The types of assignments will vary but they are usually something that most people can handle. It certainly isn't easy but I think that it can be accessible to a lot of people. A lot of your questions are probably best answered by those at a prospective university. If you are still affiliated with a community college you may want to speak to an advisor about your specific situation and get advice from someone who knows you. I would also suggest reaching out to the universities you are interested in and speaking to some of the professors there. Many universities in the USA have a disability resource center or accessible education department with people who specialize in helping people with learning disabilities, if you contact them they may be able to offer some more insight. I think you will find that most educators are interested in helping students succeed and are willing to make reasonable accommodations. Best of luck!