If you want to be smart about it and don't mind paying a bit more today so you can save money in the long run, don't get the kit lens is the rule for DSLRs. For vlogging, you will want a lens around 24mm (35mm is still doable when recording yourself in selfie mode but it's still too much zoom for this job). As beepIT says, you will want a fast lens. In the particular case of the 77D you can actually get a fast lens for vlogging for the same price as the kit 18-55mm lens. I'm talking about the Canon EF-S 24mm f/2.8 STM Lens. This one doesn't come with Image Stabilization, which is okay because the 77D has its own stabilization for video.