Yes, you can easily clip a dog, you just want to make sure you have proper control of the dog while clipping so you don't accidentally cut them.
You first want to bathe the dog and get them very clean. If you can use some sort of pet-friendly conditioner, I recommend using that as well because it will make the fur easier to clip. Make extra sure they are totally dry before clipping or you could cause the blades to rust.
I recommend using clippers like Wahl that you can order online. If you want to really invest, Oster is a great brand.
As always, be careful and give lots of treats. So your dog gets used to the sound and feel of the clipper, hold the back of the clipper against their body a few times so they get used to the vibrations. Every so often, you will want to turn the clippers off and let them rest because they can get hot.