This is not strictly strata related.
But as a tenant, you cant just decide to break a lease. You are bound by the conditions of the lease until the fixed period expires.
That means, you can ask to break the lease, and pay any break fees. That could be anything from the rent to the end of the fixed period , down to a few weeks rent . Read your lease.
If you “break” your lease with the consent of the landlord/agent, then you would not be considered to get a black mark against your name.
Many times people need to break leases for good reasons (relationship breakup, job change etc) and a good landlord/agent will accept the reason (though you still need to pay the break fee)
If you just dont like the place or the agent, that is no valid reason to break the lease. Remember that you (should have) inspected the property and interviewed the landlord/agent. What I am saying is that in this case you have no legal aveneues to pursue a lease termination.
However, you can ask to break the lease with the permission of the landlord and pay any break fees.
If you go an find another place to live before you have lawfully terminated your current lease, you could find that you are paying two sets of rents.
Sneaky is not always oggd.