Going back to school is one of the most fun and rewarding experiences you can have. It can also be confusing and challenging for the following reasons:
You'd have to worry about being the new "kid" on campus and fitting in with a bunch of younger students.
You'd need an affordable course now that you probably have a lot more financial responsibilities.
You need to complete your course despite the demanding schedule between your job and family and other responsibilities.
You'd prefer to be in control of your workload so that you can easily fit your studies into your schedule.
With all these concerns, studying online might be the best option for you. You don't have to worry about fitting in, it's usually cheaper than a course offered in the university, it can fit into your schedule and you can study at your own pace.
There are various websites (including universities that offer online courses) that offer various online courses, certificate and degrees. If you want continuing professional education credits, you'll also find sites that offer free CPE credits. It just takes a little resourcefulness in using the internet to find the courses, schools and institutions that will make going back to school as an adult easier, cheaper and better for you.