Replacing a flat tire is actually an easy DIY task. You will need: Wrenches, jack, jack stands, new tire and hand gloves.
At first, you need to scan which tire is flat. To replace the flat tire, you need to install the jack under the car. Just for the security, do not leave your car on the higher level on the support of jacks only. You need to properly install the jack locks and stands to make sure that your car is under control and there is no chance that the jack will slip out. Once you safely raise the car, and then loosen up all the lug huts associated with the flat tire. While you do that, put on the hand gloves. After you remove all the lug nuts, just pull the tire a bit, and it will come out on its own. Now install the new tire in the same way that the lug nuts can be installed the same way as it was on the old tire. Now tighten the lug nuts properly. Make sure that any of the lug nut is not loose. If there are any lug nuts loose, then there are chances that your tire may lose up and you will lose control on the car.
Now remove the jack stand and pull the jack stool to the ground level and remove it carefully. It’s done!
In addition, take your flat tire to a mechanic and get it repaired as soon as possible. One needs to carry an extra tire in the car if in case you have a flat tire on the middle of the road. Also, when you change the tire, scan the brake pads as well if the edge is rough or smooth. This way you can actually have an idea if your brake pads are on the edge of dying or can they still survive.