The orgs that do exist do have study platforms. PSL, for example, requires a year of training and study before becoming a full member, and has Liberation School for anyone to make use of. However, this cannot truly be compared to the resources and study a university can provide, which is what I am more jealous of. Study at the level of a budding revolutionary party in the heart of a deeply reactionary empire is always going to be a struggle, needing to overturn decades of anti-communist propagandizing, and the kind of higher-level Marxist debate that happens among contemporary Marxists is mostly out of reach for us in the west.