Nokia 3 has 2 dedicated sim card slots and you can use the nano size sim cards.
No. Nokia 2 does not have the fingerprint sensor.
Yes, you can use the Jio sim card in Nokia 2.
Nokia 2 has IP52 drip protection. That means it can withhold minor water pouring. But you need to be careful as the device also has the 3.5 mm jack and water can damage the phone.
It's not a bad phone, this Nokia 2. It's just that there's only so much you can do within a budget this tight.