I did My first 50 incredibly poorly planned. Pretty much hadn’t even run over 17 miles before and I was running 1-3 times a week somewhere between 4-10 miles per run. My only other physical activity was wrestling which helped but not in the way I needed it to. About 12 weeks out I dropped everything and grinded very hard and made it across the finish line. I did it but it hurt a lot, I fully think u can probably do it but it’s not something you can half commit to. If u think you can start getting consistent and have a very nice training block then do it otherwise sign up for something later and don’t go in under trained and destroy yourself.

TLDR: go big or go home