Regarding your question about viewing the "youngest" stars, it's important to note that the term "youngest" is relative when it comes to astronomical timescales. Stars form continuously throughout the universe's history, so there are always newly formed stars at any given time.
However, observing the very early stages of star formation can be challenging due to the vast distances involved and the presence of dense gas and dust clouds that can obscure our view. Nonetheless, astronomers use various techniques and instruments to study young stars and star-forming regions, such as infrared telescopes that can penetrate through dust clouds.
By studying these regions, astronomers can learn more about the processes involved in star formation and gain insights into the early stages of stellar evolution.