Tags workflow: creation, copy/pasting & exporting

Do I understand correctly or this involves some manual discipline to start every note by adding the inline tags after the text "tags:" ? Or is there any custom template you created?
Also, this would work for the next created notes only, but not for the ones that have been already created, right?
Also n.2 I guess this does not work in rich text?

You can then convert these inline tags to Joplin tags on-the-fly 2 (if you don't mind the auto-complete)

How?

or using an inline tag converter

How?

Pretty much all figured now see post below, sorry for rushing up the post!