If you are looking to learn how to make more of LinkedIn – they offer free online training to their users, looking to make the most of the affordances of the medium!
There are a series of pre-recorded webinars on the following topics:
Also, there are also live webinars – for which you can sign up here
the next one is on June 28th!
All this and more resources may be found on their help page
Career Linguist 