First i want to see them fly a proper armed UCAV. Their Rustom 2 /3 whatever.The problem with designing an aircraft like this is it will be obsolete once it is ready even if everything went ok.
India would be better off either purchasing aircraft or licensing production outright.
India would need to design a 5+ or 6th gen aircraft if they don't want the design to be obsolete on arrival.
Then let's see if they can indigenize the Tejas Mark 1/ 1A whatever ( except the engines).
Then let's wait for the tests on their TEDBF fighter. I'm guessing it'll take atleast 5 years for all the testing to conclude. We are looking at a new fighter jet that needs to survive the punishments of ski-jump takeoff and landing. 5 years is not enough tbf.
Forget about 5th gen. It depends on economy and technological might. Unless they want to try being the Iranian stealth Q313, an aircraft atleast the level of FC-31 first prototype would take 2030.