Self Assessement as EU-immigrant

I recently moved to the UK on a spouse visa. Before moving here, I was registered for VAT in my home country. I'd like to register as a sole trader here, but I don't know how to do the self assessement. Do I use my foreign tax return and translate it? Thanks in advance

Hi Lotte Pasmans,
Please refer to guidance here:
Set up as a sole trader: step by step
Thank you.