Law / New car registration with old insurance after car purchase in Poland [5]

Hello forum,

This is my first post here,

I recently bought an old beater car, it's insured with basic OC to the precedent owner till June 2019, but he was paying that in rates every 3 months, so it will need to be renewed in January and April.

1 - Do I need to register the car at my name or can I drive it without registering it? Talking with a guy he told me that I don't need to register the car again and that the purchase contract was enough to drive, but reading online it looks like I have the obligation to register it within 30 days from the moment I sign the contract.

2 - Do I need to cancel the current insurance and register one at my name? I'm a young driver and the current car insurance is considerably lower than the quotes I got around the internet, so for me it would be nice to just renew the current insurance till June, but can I do that? I really don't want to get in trouble with insurance refusing to pay because the insurance was not at my name.

Thanks in advance for any help.