VLAN’s are the hardest to understand (at least, for me and from reading your requirements). But…it all starts here:
Make sure to understand all…then you will do just fine.
Next…as you are referring to YouTube…check all videos on the MikroTik channel. They are absolutely great!
And last (but not least), learn CLI (as far as you haven’t already). It is a great way to understand more about settings. First command:
/export (will export nearly everything)
/export file=anynameyoulike (will write the above export to file)