If Kimmich wants to transfer to Real Madrid, this will probably be his last chance. Because Real Madrid does not easily transfer a 29-year-old player. If Kimmich does not mind being a substitute, he can transfer to Real Madrid. In my opinion, it would be best for him to finish his career in Bayern Munich. Of course, the choice is entirely his. I think every player has a dream of playing in Real Madrid. Maybe he has that dream too.
There is no certainty about Kimmich's future because even though Real Madrid and Liverpool have a great interest in the player, Bayern Munich are trying to do everything to keep the player even though so far the discussion of his contract has not gone smoothly.
If he can show his best quality, it will be much easier for him to penetrate the main players in the Real Madrid squad and I am sure he has the ability to do that.
Staying at Bayern Munich is also good but losing the opportunity to achieve his best career considering his age is no longer young.
At Real Madrid he can realize his dream faster as long as he can provide the results expected by the coach.
All decisions may be considered but to what extent Real Madrid makes the decision to recruit him.