Hi Virender,

your income will depend on the stake you attract, in my article I included a link to a spreadsheet which let's you calculate the profit based on the relevant factors: hardware/network costs, stake, commission and SOL price (if you care about profit in fiat currency).

In terms of buying SOL and staking, you can buy on Binance, however from Binance you can't stake directly with any validator, they have their own staking system (but I believe they actually lend your SOL out, it's not proper staking in the Solana sense). The best option is to use a wallet like Phantom wallet, withdraw your SOL from Binance to Phantom then in Phantom you can stake. If you want to stake with my validator you can find it by searching the name "Laine" or from the vote account pubkey I mentioned in the article (begins with GE6).

When you stake you delegate your SOL but the validator never has any actual control over it. You can undelegate and withdraw your stake at any time and the validator can never touch or steal your SOL.