As a distance Master's student who didn't have the same background in bachelors, how do I make my profile strong to get chosen for PhD in USA or UK ?

Hi. I'm a Physics graduate. I'm switching to Sociology this year. I'm starting my Master's in Sociology this year from IGNOU ( a distance learning university in India).

I am not able to do this master's in regular offline course as I'm preparing for govt. jobs right now.

But my further goal is a fully funded PhD in the USA or UK in Sociology.

But given my profile I think it's too weak to compete for a fully funded PhD. I don't have sociology bachelors background. Also my master's will be in distance learning. So , how can I make my profile strong and stand out ? Should I do more courses from Coursera like site? Should I write paper? Or try to publish? I have no idea how to do that on my own though.

Can please people guide me here? I want to work hard and give my 100%. That's why I'm here trying to understand the process and what I can do to get chosen for an abroad PhD.

Please guide me.