Using the DeWalt DCS369B is a piece of cake. First, make sure you have a charged 20V MAX battery (sold separately) and insert it into the saw. You can use the tool-free blade release to quickly install one of the two included blades. When you're ready to start cutting, hold the saw firmly with one hand and press the variable speed trigger. You can adjust the speed according to the material you're cutting. The LED will light up dark areas, so you can see what you're doing clearly. The pivoting shoe gives you more control and better cutting angles. When you're done, remove the blade carefully using the tool-free release. For maintenance, keep the saw clean. After each use, wipe it down with a dry cloth. Check the blade regularly for wear and replace it when necessary. Also, store the saw in a dry place to prevent rust. And always follow safety instructions, like wearing safety goggles and gloves, to stay safe while using the saw.