Here is a selection of online exercises that will help you practice the future tenses if you feel too lazy to use a pencil!
https://www.englisch-hilfen.de/en/exercises/structures/error_text_tenses.htm
https://www.englisch-hilfen.de/en/exercises/tenses/future.htm
https://www.englisch-hilfen.de/en/exercises/tenses/future2.htm
https://www.englisch-hilfen.de/en/exercises_list/zeitformen.htm
https://www.englisch-hilfen.de/en/exercises/tenses/will_going_to_future.htm
https://www.englisch-hilfen.de/en/exercises/tenses/will_going_to_future2.htm
You can check them on the go to check your progress!