My first car, alto 800 lxi

Bought this second hand car, 2020 August registered alto 800 lxi. Car ran almost 11.5k kms as per meter. I paid 2.9 lakh for this, including registration and servicing(I think I was overcharged, but it was impulsive buying). AC working fine, steering felt little hard, break, accelerator, clutch all okay. In music stereo, radio working, 3.5 mm jack not working(probably), unable to connect my phone through usb cable(it shows reading and then nothing happens). Suggest some modifications I can do on this.

Bought this second hand car, 2020 August registered alto 800 lxi. Car ran almost 11.5k kms as per meter. I paid 2.9 lakh for this, including registration and servicing(I think I was overcharged, but it was impulsive buying). AC working fine, steering felt little hard, break, accelerator, clutch all okay. In music stereo, radio working, 3.5 mm jack not working(probably), unable to connect my phone through usb cable(it shows reading and then nothing happens). Suggest some modifications I can do on this.