Question

is "yo dijí proper grammar, or should i use "yo dije"? for "I said"

Answer 1

you should use "yo dije"

Answer 2

Use the “yo dije”
Yo dije= I said

An example of this in a sentence could be:
‘Yo dije’ qué quiero ir a comprar
I said I wanted to go shopping

You can use this in a lot of other sentences as well this is just an example,

Hope this helps! :3