Check out these links for Spanish learning

For grammar exercises and much more:

https://aprenderespanol.org/

Plenty of activities for you when you know a bit of Spanish:

https://www.profedeele.es/

Reading practice for all levels:

https://spanish.kwiziq.com/learn/reading

Reading comprehensions and much more!

https://www.learnpracticalspanishonline.com/beginner/beginner-readings.html