That is where I practice for HSK listening, it is free and keep updated, the channel owner has found some true test somewhere and recorded the listening by herself.
So many useful links in this thread to use. Will be definitely checking most of them. Studying demands so much focus and willpower. But thankfully there are ways to rest. For example playing some games, these ones have great [core features](https://500freeslots.com/free-spins-slots/)and easy on the eyes design.