First, I'm 98% sure the company is doing a transfer freeze entirely so you may not be able to do so until the pandemic is over enough for most things to return to normal.

Second, I think transfering is usually like 3-6 months of working? But when I had to transfer last summer briefly, my SM said there's a lot of discretion and maneuverability based on the part of the SMs and DMs. So talk to your SM as soon as possible.