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?

If you work in the UK, you pay taxes

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