How much time should I spend getting input every day?

Even small amounts of input will result in long-lasting acquisition, since acquired language is not easily forgotten, as opposed to explicitly learned language. However, seeing the progress you are making is useful to keep you motivated, and getting too little input will make it harder to notice that you are actually learning. In addition to that, you probably want to get to a good level in the language at some point that’s not decades in the future. For those reasons, and based on our own experience, we recommend spending at least 30 minutes a day consuming comprehensible input if you are learning a language that’s at least somewhat related to your own language, or 1 hour for a language that’s completely different from other languages you are proficient in.