Remittance or arising basis?

Hi all,
we arrived in the UK last year. I've already read a lot about tax matters on official websites, but I'm still confused. I don't know how long we are going to stay here and we will most probably go back home one day. So my question is, can I choose the remittance basis now and then change to the arising basis in the future?
Thanks

If you work in the UK, you pay taxes