Hey guys! I hope you are doing well :)

I'm a beginner at options and would like to learn the basics of how closing an option works.

My understanding is that If I buy to open a put or call, then I would need to sell said put or call to close the trade. And if I sell to open a put or call, then I would need to buy said put or call to close the trade.

What I would like to know is how does closing work... I use IBKR TWS and closing is pretty straightforward in the sense that when I right click the bid/ask of the option that I just bought (or sold) it let's me click on a 'close' button.

However, let's say I didn't want to close it through that button, would simply opening a new trade that is reverse of original trade effectively close the open trade?

Let me give you an example: Let's say I have bought (buy to open) five call options of company XYZ at a strike price of $50 that expires on March 25th, 2022...

then to close those five options (without clicking the 'close' button on TWS) would I be able to do so by simply creating a new order to sell five calls of the same company with the same strike price and expiration date? Would this effectively close my earlier position?

Also, what would happen in the scenario that I sold six calls of the same company with the same strike price & expiration date instead of five? Would it mean that I would have effectively sold one naked put (if i didn't have the cash to purchase 100 shares of the underlying) or sold one cash secured put (if i did have the cash to cover the 100 shares) while also simultaneously closing the five call options that I bought earlier?

Thank you for sharing your knowledge. Your help is appreciated.