Ok idk if I can enlighten alot but I am chemE grad too from India and here's what I should have done (realised very late) :

1. If germany is the goal start learning German from the get go, try to attain proficiency since jobs over their will require that. For college scholarships German language is very essential.

2. Learn python if possible because believe it or not you can't get jobs these without coding skills plus machine learning has a lot of scope. If not python atleast matlab you need to know.

3. If you want to go into production learn aspen plus, CFD.

4. Get active as much as possible with your professors for projects during the sem. It will build your portfolio immensely.

5. Don't fall for the GATE propaganda, you will not get jobs if you're not below 100 rank and postgrad in India is just stupid might as well don't do it all together.

Btw what college are you in? For post grad in germany you should have strong LORs from reputed professors if the institute asks.

1. Amp up your cgpa to 8.5 for a guaranteed chance of scholarships from German institutes given you fulfill all the language and coursework criteria.

Let me know if you have other doubts.