how to initialize the struct of following structure in golang

I have the following data structure. I need to initialize it without using nested initialization. This data structure will be flushed to output a json file later.

type GeneratePlan struct{
	Mode    string `json:"mode"`
	Name    string `json:"name"`
	Schema  string `json:"schema"`
	Version string `json:"version"`
	Attack_plans []struct1 `json:"attack-plans"`
	
} 
type struct1 struct {
	Attack_plan Attack_plan `json:"attack-plan"`
}
type Attack_plan struct{
	Attack_resouces []struct2 `json:"attack-resources"`
}
type struct2 struct {
	Attack_resource Attack_resource `json:"attack-resource"`
}

Problem is when I try to append the variable of type struct2 to the Attack_resources[] slice, it gives the error as

cannot use struct2 (type *structs.Struct2) as type structs.Struct2 in append

How can we initialize the struct without using new or any ptr? As, if we use any of the standard struct initialization technique, it will give the above error.
If I change the above data structure and make it hold a pointer to another struct, it doesn't store the values correctly. I am very new to golang. Any help is appreciated. Thanks in advance!

You can initialize a struct value using:

resource := struct2{}

As @nothingmuch pointed out, if you have a struct pointer and need the underlying value, you can dereference the pointer using:

deref := *resource