I need to knowhow to make a map.

Follow your own advice you provided in the subject line. Click on Help. Look at last question.

Once you've read the wiki, please let us know what questions you still have.

As a brief overview, you need to create the graphics of the Map in a separate software. Inkscape is recommended.

Then, upload the SVG file to WarLight, where you will name all of your territories, connect them to each other, and assign them to bonuses.

Following, you will test, then release.