How do I know the cost to store Eth on Hardware device and how do I stake?

Hi, Eth Noob

1) If I manage to buy up some ethereum, how do I see the "gas fees" chargeable when i transfer it to a trezor wallet? If I manage to get 1 Eth, will it cost $100's just to store it?

2) If I got to 1 Eth and wanted to earn interest on it… how do I do this?

Thanks