Awesome. Thank you very much for your comments. This helps me a lot! Got more questions. Hope you don't mind. If a new transaction is broadcasted, which miner gets to record in a block? Whoever records it in a block and issues it first gets rewarded? Like a competition? Does a miner get to decide how many transactions to be recorded in a block? If you know, can you please share some current applications or cases with me where bitcoin networks and blockchain technologies are actually used in transaction processing? Sorry again for asking so many dumb questions at once. Thanks!

@MCCCS thank you for the link and your help!