It depends on the course and university, but changing is not recommended unless it’s in the first few weeks of the first semester, otherwise you will fall behind on coursework quickly, it’s something that if you want needs to be completed ASAP. Alongside a transfer can take a week to complete I.e see all the new modules so be aware of this also.
You would need to speak to your head of year and course leader to discuss this alongside have reasons for transferring.