Fuel economy depends on lots of factors.
Clean airfilter. Preferably genuine.
Tyre pressure should be given on the tyre sticker on inside of door. 30psi is too low for these economy hatchbacks. 34psi is fine.
Oil. Please please dont put in thick oils. Our local ustaada dont know shit. Most of these cars are rated between 0w20 to 5w30. Put in 5w30 as a safe option.
Also get your CVT oil checked.
Congrats on purchase. How much did it cost you? And its mileage