Great question! I originally began my undergraduate career in Biomedical Photography and then switched majors while completing classes.
I got interested in photography in high school, I was often taking photos of my friends and I taught myself how to use an SLR camera.
The day to days of being a photography really depends on what part of the industry/ what specialty you have. There's science photography (forensic, macro, microsopy - where you could from anywhere from a hospital or a crime lab taking images, there's also fashion/advertising, photojournalism, wedding, landscape/ nature, etc. ). I think if you're extremly interested in a career in photography going for undergrad could be a great benefit to you. While it is not necessary, you will make excellent connections and have great opportunities for internships and get hands on experience for what the real world of photography is like. You can learn things such as film photography if that's of interest, lighting, editing - retouch and restoration, and even get experience with other subjects such as web design, writing, etc.
I'm going to be honest with you photography is an extremely tough industry to make it in but it is not impossible and it depends on the path you're interested in. Many of my close friends have graduated almost 4 years ago from RIT which is a top photography school in the country and struggle to find day to day work, many work as freelancers, many are in full time positions assisting in photo studios or as retouchers.
Id recommend reaching out to photography companies in your area - perhaps wedding photographers and asking them if they need any interns or if you could shadow them for a day. This will give you an idea of what the day to day is like and whether it's something you would enjoy.
Hope this helps!