You know like
Who, what where when how why etc. That way when I see • Kiu estas tiu viro? I know that is who is that man?
and again I know it is not always that simple, but it would be a start.

I do not understand what you meant.
When one says Kiu estas tiu viro?, he knows that the one he is talking about is a man, but actually he know nothing about him, except that is a man. So he wants to learn more about him. "Kiu" is here "Who", but as far as I understood, you got that. IMHO this is easy to a understand, but once more, I do not really understand what you meant.

BTW do you know if lerni still has the tutor program or is that gone? I remember there were lessons which would be sent to a person who would then correct and return by email th corrections and answer questions.

I don't think so. But you can chat with Esperanto teachers on edukado.net

If I made grammatical mistakes, please correct me.

Se iuj volas, ke mi traduku kion diris mi, bonvolu demandi.

Okey, perhaps you count me in into those experts with no patience…

The Lernu course is based on so called Zagreb method, that teaches 500 most relevant word roots and most commonly used pre- and postfixes to them (the main way of constructing words in Esperanto). There is a sound pedagogical base for the method. I strongly recommend taking the lessons and reading the grammar sections in them as they they will gradually teach you e.g. the table words a.k.a. correlatives or la tabelvortoj resp. la korelativoj (i.e. those who, what where when how why etc.). There is little point tossing them all to you, you would probably get very confused. The gradual approach using in the Zagreb method is much better. Be patient, do some exercises and ask here.