Watch every vdieo from about 2018/2019 onwards of the TubeBuddy Channel, and Nick Nimmin's channel. The value and knowledge is literally priceless.
But long story short, in my opinion, THUMBNAILS, TITLE and topic are the most important things to be learning about when you start.
You can't really convince someone to watch a video they aren't interested in. So you have to research your niche, the trends, and form good content based on that research, and a good cover will draw people in.