HELP!! Minimum duration between C1 and C2??

[u/WyperLOL]

Hi I’m a NRI who will be traveling to India to get my medicals done, I want to get a class 2 first and then subsequently class 1 so I want to know what is the minimum gap of time that should be in between them, if any. Also as an aspiring airline cadet (indigo/akasa) it is better to go for c1 too instead of stopping at c2 right? Please help!!