Data Validation from one column locking another column until condition is met

Hello,

I am brand new to the forum so bare with me on explaining this. I hope this is clear.

I am fairly efficient in excel/google sheets but I cannot get this right and I hope you guys can help.

I have 3 total columns that I am working with Columns I, J and K

Column I has a dropdown list with 4 options
Gradebook
Load
Delete - Core
Delete- Elective

Column J only available if they pick Delete - Core or Delete - Elective from Column I

Column K is also conditional per Column I but I want these to autopopulate based on what is selected in Column I

Gradebook = Setup
Load = Setup
Delete- Core = Load New Curriculum
Delete - Elective = Delete Course


Sorry if this is confusing if you have questions please don't hesitate, I may be overthinking this but this is beyond my abilities.

Thank you in advance for your assistance.

Code for Column I will save however it doesn't load anything into Column K once an option in Column I is selected.

I didn't state clearly for Column J earlier and that's my fault that it should be allowed to accept any text put in. So it is locked until one of the option in Column I has been selected.

The initial code got me on the right track. Thank you for the input.