Not sure if linking to reddit is frowned upon here, but there's a great subreddit called r/dailyprogrammer which has fun coding challenges ranging from beginner

Not sure if linking to reddit is frowned upon here, but there's a great subreddit called r/dailyprogrammer which has fun coding challenges ranging from beginner to difficult. I've found they are great for practice because they have defined "success" states, they really make you think, and you can compare solutions with others in the comments. And you can use any language you want.