To keep it a learning tool rather than a professional replacement, there are a few boundaries: Variable Limit: You are typically restricted to a maximum of 15 variables Sample Size:
If you are a statistician comfortable with coding, R Lavaan is the best free tool. However, if your professor requires "LISREL output" or you want to learn the legacy syntax required to read older research papers (pre-2010), the LISREL Student Version is indispensable. lisrel student version
While 75 observed variables sounds generous, it fills up quickly if you are using scale items. For example, a study with 3 latent variables, each measured by 5 items, uses 15 observed variables. You have room to grow, but complex models with hundreds of indicators (e.g., Big Five personality tests) will crash. To keep it a learning tool rather than