How to make a good YouTube channel?

Hello

so when I was in college I started a yt channel in my 2nd year where I used to post educational/medical content. I gained a fair number of followers but I haven't posted anything in years.

I want to work on that again and need advice on how to make YouTube videos in an easy way

1. Which apps can I use?

I have both a phone and a tablet but I've never tried on my tablet and it's really hard to edit videos on my phone

Suggest video editing apps as well.

2. Suggest a good mic as well, the one where you just clip it on yourself

I wanna try that way where they're like teaching on a whiteboard/writing on tablet. What apps can I use to make videos like that?