Can I unstake my stETH?

I've been staking my Ethereum through the stETH platform for quite some time now, and recently I've been considering the option of unstaking it. Could you please clarify for me, is it possible to unstake my stETH? If so, what would be the process involved? Would there be any penalties or fees associated with this action? I'm also curious about the potential impact on my overall holdings if I decide to unstake. Could you provide some insights into this matter? I'd really appreciate your guidance on this, as I'm still relatively new to the cryptocurrency staking scene.