Yes, you can stop living in the property and move out if you wish, but you will still be liable for rent, bills, etc. If the property is going to be unoccupied for more than 3 weeks at a time, please let your Host know, for property insurance purposes.
If you wish to break the contract before your fixed term or break clause allows, you will need to find someone to replace you, i.e. someone to sign a new rental contract with the Owner, which will allow you to end your rent obligations.