What can be considered as "Home ties" for a UK Standard Visitor visa (PLAB)?

I am an Indian national who recently cleared his PLAB1 examination and has booked to sit PLAB2 in UK (which can be given only in UK). Before applying for a visa, I would like to know about the how one can prove home ties. Of course, I have read about the Family, Job, Property being used as ties but...

I haven't worked since my graduation (two years now) as I wasted a lot of precious time on USMLE. After that IELTS and then PLAB1. So can't show job as tie.

I don't have any property in my name but my father does have residential plots and agricultural lands worth a few crores on his name.

Does an affidavit that I am his only son and heir to all that bla bla bla, serve the purpose?

I do have few life insurance policies in my name.

Can they be used as an indicator of some kind of active Indian society member thingy?

I am unmarried but do intend to show my parents as family ties.

I did my medical studies in China (6-7 years). I have also traveled to a few countries like Russia, Thailand, Philippines, HK, Macau etc etc (though not a single Western country).

Can that be used in my favour in home ties that I have always obeyed country's laws and returned to India upon completion of the purpose of the trip?