I align myself with leftism and moreover, with socialism, that is all that I can confidently claim to now. Thoughts cannot be further developed until one reads and studies.
Read:
Karl Marx and Friedrich Engels, A Communist Manifesto
Rose Luxemburg, In Defense of a Nation
Vladimir Lenin, Karl Marx: A Brief Biographical Sketch With an Exposition of Marxism
Vladimir Lenin, The Three Sources and Three Component Parts of Marxism
Friedrich Engels, Socialism: Scientific and Utopian (currently reading)