Before you start Vlogging prepare yourself. Pick a topic which interests you, learn the topic, learn some basic filming and editing, create a community on social media to get involved with your viewers, lastly and most importantly plan for what you are going to do.
Practice some days to talk confidently in front of camera, arrange good physical materials for your studio, gather knowledge and stay confident on what you are saying.
Use different strategy to attract more viewers, give resourceful videos, try to make a relationship with your fan. Try to understand the viewers choice, it will help you to grow.
Choose the platform where you want to start your vlogging and dedicate yourself.
Best of luck.