I was reasonably sure I could never write, because I wrote some truly awful short stories in high school and college. As excited as I was by them, they sucked. Yet I still wanted to write a novel as a life goal.
I also research and learn for fun, and put together very different elements of stories until I said, "That's crazy! It's a fusion scifi Nazi ancient Greek Hindu culture with friendly cannibals!" and it was so weird, I had to write it. Highly diverse backgrounds and knowledge gives you access to the fun little snippets of information that make stories feel more real. You begin to see the common elements in very different things, and can tie them together.
As I mentioned in this question, your first novel will suck. It takes a lot of reading (which sound like it shouldn't be a problem for you) and practice to be a good writer. But write short stories to practice, and see HOW and WHY they suck. If you have people both patient enough with you to read your stuff and brutal enough to be honest about it (no moms), you will see patterns of what you're doing and fix them. You'll read with a different eye, and see that even 'good' novels have glaring deficiencies that don't stop them from being fun or getting published.
Now, that's no promise of success. You may NOT have a talent for writing, but I didn't think I did either - until I did a lot more of it. Do you LIKE writing? Is it fun and rewarding? If it is, you can do it as a 'hobby' while trying to get things published. If you DON'T like writing, it's not a stable career, and I'd avoid it.
I would suggest getting on Worldbuilding SE. A diverse set of knowledge will serve you well there. You'll get to think about weird questions in stories, and come up with fun answers. You establish a sort of online presence, and if you have great answers, you can ask questions and build up some fun worlds to write in. Publish a few short stories, write the crappy novel (for fun), then write the one you're really passionate about (when you know what you're doing).