Watch the videos, the first one is an explanation and the second one is to practice.
Now, do the exercises and games:
1. https://www.learnenglishfeelgood.com/reported-speech-mixed1.html
2. http://esl.fis.edu/grammar/multi/repspee.htm
3. https://www.usingenglish.com/quizzes/102.html
4. https://www.learn-english-today.com/lessons/lesson_contents/exercises/reported-speech_online-quiz1.html
5. https://www.englisch-hilfen.de/en/exercises/reported_speech/backshift.htm
6. https://www.englishexercises.org/makeagame/viewgame.asp?id=1629
7. http://a4esl.org/q/h/9901/tm-reported1.html
8. https://www.englisch-hilfen.de/en/exercises/reported_speech/pronouns.htm
9. https://www.examenglish.com/grammar/B1_reported_speech.htm
10. https://www.turacogames.com/games/reported-speech-grammar-game-for-esl/
11. http://www.engames.eu/reported-speech/
12. https://jeopardylabs.com/play/reported-speech-game2
