How to use Namaste! LMS – a few questions

Hi,

I have just started using this plugin but I can’t understand a few things, could you please help me so I can understand whether this is the right plugin I need?
I have a website (http://www.ottimizzazione-pc.it) where users can read lessons on how to speed up your pc. So far, there is no membership or community, all the lessons are open to everybody, there are no quizzes or tests, users just read the lessons they are interested in but there is no track of what they have already read.
Now I would like:
1) to better organize the content, structuring it in courses containing lessons. My first question is: is there any way I can use my previous posts and pages and convert them to courses or lessons? How can I do that? I imagined there was something like a button to convert a post to lesson, but I don’t see it when I open a post in my wordpress panel, and I wouldn’t want to re-create new lessons pasting and copying all my previous posts in each new lesson – that sounds a very big waste of time;
2) I would like to keep the content of the website open to everybody coming to it from search engines or referrals. At the same time, I would like to make possible for the users that are interested in to log in, read the lessons they are interested in, take their exams, complete courses, and check their progress tracked in their profile. Repeat: users interested should be able to create an account, log in when they need, get an idea of what lessons/courses they have read/completed and what they still need to read/complete. How can I do that? Should I integrate Namaste! LMS with a plugin like buddypress or similar?
Thanks for your help

http://wordpress.org/plugins/namaste-lms/