Need advice or guide - planning to shift career

I’m currently from a health allied field. I’m planning to switch to IT or programming bec I think I would enjoy it more plus there are a lot of international & wfh opportunities.

Can I switch career even w/o studying again? If so what are the best steps i should take to gain more knowledge and experience at the same time? I badly want to change career since there’s no growth for me in my current industry. I’m willing to work hard as long as i know i’m building skills and exp that will help me in the long run.