This doesn't have to be pretty. You do not get extra points for artistry. I'm showing you a technique for generating ideas and creating a story where you didn't have anything before, not trying to turn you into an illustrator. If you can't draw a straight line, no problem. You aren't going to need any straight lines.
Wobbles are part of the process.
Nobody but you ever has to see this map. Nobody but you ever has to know it even exists. It doesn't have to go in front of the book you're going to write, and if you decide you do want it in the front of your book, your publisher is going to hire an artist to redraw it, no matter how cool you made it look. So stop already with the complaining about how you can't draw. Then go back and draw your map.