I am so sorry for the loss of your cat. I don't have pets myself but I did growing up and losing a pet is so hard. I actually wrote an article talking about this very reason on why I am hesitant to get a pet. Just the thought of them dying saddens me so much.
I am also right there with you in trying to get out of the 9-5 job and side hustling my way to get there. Writing on Medium is one of them and I have actually come to enjoy it so much! Good luck with your goal! : )