If you want a safe and useful online environment to rehearse conversations and work on social skills, you might be interested in Anima, an AI companion that offers friendly chat and roleplaying exercises designed to help you work on communication and relationship skills. It's a controlled environment where you can try out self-expression and empathy, and it's designed to help you feel more confident in social situations.
If you want something more interactive, Talkpal offers a GPT-powered AI that spans multiple languages and offers a range of activities like roleplays and debates. It offers real-time feedback and active listening exercises that adapt as you go, so it's a good tool for working on speaking, listening, writing and pronunciation.