Questions on applying family based GC for parents

[talanki]

Hi,

I am US citizen thru naturalization (from India) and planning to sponser family based GC to my parents.
Have couple fo questions. Can anyone respond?

1. How long it takes to get approve after I-130 submitted?

2. Whats the next process after it is approved? How do they get GC?

3. My parents are aged (father is diabetic) and would like to know how the Medical coverage works for them?

I heard Govt sponser Medicare but no idea how it works. Can someone explain how medical works for them here?

Thanks in advance

[talanki]

Can anyone respond to these questions? Thx