Making videos is the only way to get started.

You need a phone and a Youtube account.

And to give yourself permission to make crap videos because beginners make crap videos and the only way to not make crap is to learn by doing. [1]

And maybe after years of making videos, you might have a popular Youtube channel. But probably not. So you need to decide what success means on your own terms.

how do I set up for good content material and make my videos interesting and where can I find royalty free music and clips

1. Audio matters much more than video, and so microphones are better upgrades than cameras.

2. Make videos that are interesting to you. Youtube reaches a worldwide audience and whatever interests you also interests thousands of other people. But they cannot find your videos if you don't make them.

3. Google.

Thinking about making is a waste of time. Making is what matters. Good luck.

[1] Alternatively, pay professionals professional rates to make videos for you.