Did you read the note on line 16 of that pastebin? That is specifically for setting up the map as a generic mod. After that you just make sure everything your mod changed is in its mod folder, you click steam upload, select the mod (leaving the auto filled unappealing unless you are doing something special) , cook, fill out descriptions, and upload. If you have steam guard on your account you may run in to problems where you have to authenticate the uploaded. If it doesn’t have a pop-up you’ll go to mod tools find and run steam cmd type “login username password” without quotes and replacing username and password with your credentials. After it logs in it’ll ask for your steam guard code, enter that and then exit. You’ll be able to upload after that.