If everything has a purpose then evil doesn't exist

[R-Farmer]

Is there really a choice we can make when gods knows everything before we are born?

I'm not advocating for free will. We do not have free will rather we are either slaves to sin or slaves to Righteousness and God. A slave's will is not free rather it is subject to the will of his master. Meaning if the master allows you a truly free choice you are allowed to make that choice (like How God gives us the opportunity of which master to serve.) Otherwise our ability to choose is dictated by our master's will.

If I choose to not spend my eternity in hell and gods knows before I’m born that that isn’t happening, is there a choice?

If show me a home movie of a trip you took with your family to Disney, and you know how it all goes and what will happen next, does it mean you did not have the ability to choose what to do when things were playing out for the first time?

 Can I change gods plan?

what do you understand to be 'God's plan?'

God plans to give you the freedom to choose which master you want to serve.. So no you can't change that plan.