This is my first post. I'm British, 18, and live in Cambridge. I will begin studying Philosophy at Harvard in the autumn.

I have read a wide variety of introductory texts, as well as some of the good stuff. I would like to delve into understanding logic. I have in my possession a copy of Principia Mathematica and Logic And Knowledge (a collection of essays by Russell).

These works, particularly Russell's 1901 essay 'The Logic of Relations', I simply cannot apprehend. The writing itself is perfectly understandable - it is the logical notations that I struggle to grasp. I am able to find what every symbol means and put individual notations together slowly, but if I was to continue doing this the works would take multiple years to read.

Question: Where can I learn systems of logic? Websites? Books? Or do I need to wait until I get to university (I would not like to do this)? I would like to be able to read a passage and understand every symbol and how each notation relates; I want to be able to speak the language, not just use google translate every time, if that makes sense.

To be clear, I understand how arguments are formulation and how standard form works etc.