Need some answers regarded SEO

Hi BHW community,
Background
I have started my journey with MNS+amazon+adsens and I want to ask you guys for a little bit of help.
Anyway, I started doing SEO for about two weeks ago and when I started I was ranked 80+ on google.
Current position is 14 at second page. I constantly checking and at one moment I'm 14 and second I'm 48, and after that I'm back at 14.
Questions
1. Is that normal to site just jumping up and down?
2. Will it be stable after some time?
3. Anyone can recommend good guide to learn SEO? (SEO 101)
4. Does it work like "more high quality backlinks, higher rank"?

I have learned a lot so far on this forum and I want to learn even more, but I keep getting lost in all these terms. That's why I made this thread.

Thank you very much for being awesome community!

Also, is there anyone who is expert in adsens? I need help with setting up something.

Regarding instability in SERPs

• Are you logged into your Google account when you check... If so that is bad.
• Google isn't 1 web server. It is hundreds of web servers. So updates across all of them take a lot of time. So if your requests go to servers that are out of sync then you can see differences.
• Google also runs experiment servers that mix things up. If you see an experiment result set then you aren't seeing what the rest of the world sees.
• You have to check your avg position in GSC because people in different places on different devices using different network connection types see results appropriate for their circumstances.
• and standard Google Dance that occurs when you make changes to your website and Google has to process those changes.

There are a ton of SEO tutorials on youtube ... view several and test what you learn before believing it. Also make sure that you only view tutorials that are valid for 2017.