Can I assign (transfer) the lease to someone else?

Yes, unless your power to do so is restricted by the terms of the lease you sign. Landlords can require tenants to guarantee the performance of their immediate successor, but subject to this, cannot unreasonably withhold consent, unless the lease explicitly prohibits assignment.

Can I sublet the premises?

Generally, yes, unless your power to do so is restricted by the terms of the lease you sign. There are often controls about the rent. Seek advice.