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.
A 'choke novel' might be a type of novel that has elements which are constricting or suffocating in a metaphorical sense. For example, it could deal with themes like a character feeling trapped in a certain situation, whether it's a relationship, a job, or a social environment. The plot might revolve around how the character tries to break free from this 'choke' - like state. However, this is just speculation as we don't really know the exact nature of this 'choke novel'.
I'm not sure specifically which 'choke cock story' you are referring to. There could be various stories with this name. It might be a very specific or even a local or personal story.
If Grogu travels back in time, he might become more confident in his abilities. Meeting powerful Jedi in the past could give him role models and a better understanding of his own potential. For example, if he meets Yoda as a youngling, he could learn how to better control his Force powers and be more assertive.
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.