I can only spend maybe 10 hours a week on this
Since you already have a full life, something would have to give. The amount of time you estimate to be available would get to hobby level: the same as the other thousands of amateur astronomers in the country. But it's not enough to do any serious studying, get qualified or do research to a publishable quality.
I read through the comments to find this comment so that I didn't just post a duplicate if someone else had covered the ground.
Let me be really blunt about the amount of time you are intending to invest in this project. If you were taking a college course, you should expect to spend 2 hours out of class for each hour you spend in class, and given that you only have 10 hours to dedicate to the idea, that's effectively 3 credit hours for every interval. So if you picked a community college, and they offered all the classes you needed, you should expect to have your Bachelor's of Science in any given degree field in about 23 years. That gets you to the necessary 210 credit hours for an Astronomy degree.
Let's say, though that you are a super genius, and can do 1:1 instead of 1:2 for in/out of class. That only cuts your time by 1/3, which means that you get that degree in 15 years instead.
Now add to this that most major contributions in any scientific field occur before someone hits their mid 20's; there are exceptions, but let's say again that you are exceptional. What contributions do you expect to be able to make after age 61 / 53, with your shiny new Bachelor's, since you're unlikely to find someone to hire you at that age, and you're unlikely to be able to afford instrument time on the necessary equipment on your own?