There are many sites that offer free tutorials but most of them lack the structure and insight of a lesson plan developed by a professional instructor in a formal setting working towards a specific goal. If you know what you want to learn and can direct yourself to find and study the material needed to acquire the desired skills, then the material offered by the free sites should be sufficient. If you need someone else's guidance to direct your study, then you should (gladly) pay for that.
We'll be here to help no matter which approach you choose.