Advice Tuning PL/SQL and INSERT statment

Hello,

This post is about these sentences:

1. BEGIN carga('DIVMTRO', 'GES-1.50', 'DIVMTRO', 1, 23058); END;
2. INSERT INTO envias400 VALUES(:1, :2, , :4, :5, CURRENT_DATE, CURRENT_DATE)

1) I am not sure how to help that this PL/SQL executes with less resources. I pinned carga. Do I have to look inside the code and tune every statement there?

AWR tells me this about these sentence:

CPU Time (s)	Executions	CPU per Exec (s)	%Total	Elapsed Time (s)	%CPU	%IO	SQL Id	SQL Module	SQL Text
117.93	7	16.85	3.10	178.24	66.16	0.90	6zczgd2a5s157	SQL*Plus	BEGIN carga('DIVMTRO', 'GES-1....

2) How can I tune an INSERT? ......... Any help will be appreciate.....