Gunga Din is fictional. It's inspired by various elements but doesn't draw from real-life events or people. The story was crafted for entertainment purposes.
It could have a huge impact. If Yoda imparts some deep Jedi knowledge, Grogu might become more confident in his Force abilities. He could be more decisive about his future as a Jedi or not. For example, if Yoda tells him about the importance of certain Jedi training, Grogu may strive to achieve those levels of training.
The name " Yellow Spicy Dice " came from its characteristics and traditional cooking methods. Yellow Spicy Din was a common freshwater fish with three bones on its body. Among them, the word " Ding " was first seen in oracle bone inscriptions, meaning nail and also having a small head. And "spicy" referred to the burning pain when the fisherman was stabbed by the yellow spicy Ding. Therefore, the name " Yellow Spicy Dings " came from these two characteristics.
Definitely not. Gunga Din is purely fictional. It's a tale that emerged from the creativity of the writer and doesn't have roots in actual events or people.
Grogu was a youngling in the Jedi Temple. He was there during the Clone Wars. His species is rare and not much is known about it. He managed to survive the purge of the Jedi and was hidden away until he was found by Din Djarin.