Starting a new channel on 2019

Hey guys i want to start a new channel
Can you tell me the best niches and how to grow it quickly ?
what to do and what not to do based on your experience

theres no best niche, do what you love and put efforts into it. no copyright materials, avoid them like plague. people are on youtube for various reasons. some people are there doing what they love, some are there to copy and steal others work and ideas so they can make quick bucks, and others are there just to watch people doing what they love.

Do something you enjoy and create original content that is not too difficult to churn out. It takes a while to receive a good ROI from your initial channel investment so you might as well enjoy the ride.

Let's start with your best experiences, ex: Create video training (Cooking, Coding, Photography...) or travel log.
Everything can be best niche if you try. I saw many people did like that, event they record videos a pig and upload everyday