5) Are there better and more lucrative alternatives to stake ETH available other than Binance?
Selling ethereum, buy polcadot.
You don't need to do complex operations to stake a polcadot, and if you change your mind, you can get coins in 28 days.
You do not need to trust your coins to intermediaries and the upside potential for this coin is high.
Polcadot wallet compatible with ledger.