For practicing:
PRESENT SIMPLE
https://www.perfect-english-grammar.com/present-simple-exercise-7.html;
https://www.english-4u.de/en/tenses-exercises/simple-present.htm;
PRESENT CONTINUOUS
https://www.perfect-english-grammar.com/present-continuous-exercise-1.html;
https://www.perfect-english-grammar.com/present-continuous-exercise-5.html;
PRESENT SIMPLE vs PRESENT CONTINUOUS
https://www.perfect-english-grammar.com/present-simple-present-continuous-1.html;
https://www.englisch-hilfen.de/en/exercises/tenses/simple_present_progressive.htm;
https://www.englisch-hilfen.de/en/exercises/tenses/simple_present_progressive2.htm;
https://www.englisch-hilfen.de/en/exercises/tenses/simple_present_progressive3.htm;
QUIZ:
https://www.proprofs.com/quiz-school/story.php?title=present-simple-vs-continuous.