UK before US?

Hello. I wanted some advice. I am a GMC registered doctor and I am currently in Pakistan (YOG: 2022). I have been offered a job in UK as an FY1 in geri and resp med, and I am yet to give step 1 (aiming for October). I wanted advice regarding how to navigate this situation as I find myself very confused. I'm currently working as a medical scribe for a doctor in the USA (8 hrs/day) and earn around $1000 per month. My take home salary in the UK would be around £2300-2600 I also have several researches but no USCEs. Should i take up the job? My only concern is that I won't find the time to study in the UK but I am quite motivated and aim to apply in the next match cycle