Don't work too much and take a break:) Just have fun to learn Japanese;)

きょうもありがとうございました！これから少しずつ一緒に頑張って会話も文法もマスターしましょうね！

He's really good at learning a language. Well done! ありがとうございました！頑張ってください！

You're doing a great job! The further question about how to say a more realistic/useful sentence was a good practice.