I have never run close to this distance, so I’ll let those more experienced weigh in on most of your questions.
For nutrition, you might enjoy Matt Fitzgerald’s Racing Weight books. https://www.amazon.com/gp/product/B0887C6J5Z?ref_=dbs_dp_rwt_sb_tpbk&binding=paperback
For inspiration that yes, you can do this (not sure about the timeline), I would check out the movie Once is Enough.
I use McMillan’s online run team for training, and I found it accessible as a beginning runner while still allowing me the tools to take my training seriously, though I don’t have experience with longer than the mid length distances. You can try it free for 14 days. https://www.mcmillanrunning.com/run-team-trial-2/
Good luck and enjoy! You’ve got this!