Polish conversation trainer needed

Hello! I am currently trying to learn Polish. My current level is B1 (lower-intermediate) but without the ability to speak. I have multiple grammar, conversation, exercise books and monolingual dictionaries and I am an educated linguist, so I easily grasp the language. What I need is a native speaker of Polish with previous teaching experience (not necessarily Polish for foreigners, but definitely a linguist) who can have conversation classes with me. Here's what I have in mind: we for instance select an article, or a portion of a book as class assignment, and discuss about it. I need to understand when to use certain cases, what the changes entailed are, as well as what verbs to use and whether to use their determined/undetermined form. I also need insight into everyday speech. I need 1-2 weekly hours, conducted via Skype (voice and writing, video optional). I am available early mornings (Polish time 09:00-11:00) and afternoons (14:00-16:00/18:00) on workdays.