Fuses are VERY cheap, you can probably get a little bag for a dollar. Ask why the old one burnt out - that's the real question here! Don't take any chances with cigar-socket wiring, it can dump a LOT of current and start a fire in short-time - seen it happen. If in doubt, have a Pro do the work on it.
The fuse is only about 50 cents or less. Easy to change. So easy that I would never pay anyone to do it for me.
Go to your local auto parts store. Locate the blown fuse in the fuse panel and remove it. It just pulls out. Your owner's manual will tell you the location of the fuse panel. Sometimes there is more than one. The panel will have a cover. Inside the cover will be a diagram of what the fuses protect.
Bring it to the electrical isle and match it up to one that is the same size and amperage. The amperage is color coded. Look for a fuse the same size and color. If you have problems finding the correct fuse, ask at the sales counter. They would be happy to help you.
IMPORTANT: Be sure to replace the fuse with a fuse that is the same amperage (color).
I usually buy a package of assorted fuses. You should always carry spare fuses. In the fuse isle you will also find a fuse removal tool. Very inexpensive. Makes it easier to remove fuses. Many times the fuse removal tool is included if you buy a package of assorted fuses.