Lighting as a beginner

Hi, I'm getting into creating little videos as a side project which hopefully will grow my following.

I've learnt from others that lighting is the most important part over having a expensive camera, how many lights and which lights specifically would you recommend? I've got a budget of around $500

My friend also has a few of these lights spare as he is an electrician, would they be of any use? https://imgur.com/a/vXiAfip