u/Ghostdoctor5

I started playing rpgs about two years ago. I've only been a GM. I did a campaign of blades in the dark followed by mothership and now mythic bastionland. For the experienced GMs out there, how do you get better at this? I'm definitely better than when I started but I'm still terrible. My biggest issue is keeping track of everything. I'm trying to keep track of every NPC, every location, myth, squire, etc. I feel like I've got to figure out how to do this without constantly searching for a paper with notes. Any advice is much appreciated.