Looking for tips and suggestions

I have brought tata nexon creative plus ps cng. I am from Valsad Gujarat. I brought it in August end month. till now it is driven around 500km I have not faced any issues but during delivery it was the worst experience they did not clean the car and gave me. I had bought it from stellar tata showroom we had a huge argument with the manager but no help from his side.

but before purchasing I did a self pdi check and since my friend has many cars and car knowledge he also took a test drive everything is fine.

so now during the first three services what should I take to look into or what should I replace during service as a noob or first time owning a car

kindly share your suggestions