Affiliate Marketing Secrets

I am almost 30 with a Bachelors in English/Creative Writing. I chose this field basically because I was flat out undecided for many years and just went with this. For many years I have felt as though I never found my “niche” in life, or what I “wanted to be when I grew up”. I didn’t focus very well in college as a result of having no interest and graduated with a 2.8 GPA. (I grew up believing I would simply take over my parents Real Estate office anyway so “who cares? about the GPA anyway?”. Almost 6-7 years later, real life experience and a lot of growing up my mind has finally refocused.
I have an incredibly strong interest in Astrophysics. My husband has his PhD in Pharmaceutics so this might have had a lot to do with being exposed to the sciences. There have been so times where I will sit there listening to the details of his experiment and wish I could have been in the room or watch a documentary on the universe with my mouth open for several minutes..and believe me when I tell you I have seen MANY of them. I strongly feel that this is what I missed out on. This is what I should have studied in college and followed through on. For Christmas I even asked my husband to get me a telescope. I NEED to do this.
At this point however I am pretty skeptical about if it will ever be possible for me to even get accepted into a program having been out of college for many years now with a not so great GPA to look back on. Does anyone out there (maybe in the field) have any suggestions for someone who found their niche far too late in life?