will it be easier to immigrate to Canada as a Polish
It doesn't change anything in terms of applying for immigration, because CIC follows a point based system, and there are no points granted or taken away based on nationality. In fact nationality doesn't go into the calculation at all. If you want to improve your application then learn both French and English and earn a higher degree in a field mentioned on CIC's website.
However being a Polish citizen you can enter Canada without a visa if you have a biometric passport, while being a Lebanese citizen you need a visa...