Is there free practice for NCLEX-RN?

Yes. NurseFlyAbroad has free clinical nursing practice with licensing-style questions, and NCLEX-RN is one of the exams it covers. No sign-up is needed to start. Begin with a short diagnostic set to find your weak topics, then study by category in small sets of 20 to 30 questions rather than random sets. Read the rationale for every question you got wrong, and write the rule behind it in one line. Redo the missed questions after two days, and track your percentage by category every week. In the last two weeks, do full timed sets. The questions are not official exam material and do not predict a pass. Use the official NCLEX materials for the real format, the rules and the fees, and check the NCLEX site before you book. Practice shows gaps, and the official source sets the standard.