How decrease the distance from the top margin and chapter title only of the title page, keeping the margins of the following pages unchanged. Also, how to narrow the distance between the title of the section and the title of the chapter?
\documentclass[12pt]{report}
\usepackage[brazil]{babel}
\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lipsum}
\usepackage[Glenn]{fncychap}%Sonny %Conny %Lenny %Glenn %Renje %Bjarne %Bjornstrup
\usepackage{geometry, calc, color, setspace}%
\geometry{a4paper, headsep=1.0cm, footskip=1cm, lmargin=3cm, rmargin=2cm, tmargin=3cm, bmargin=2cm}
\begin{document}
\chapter{Characters}
\section{teste}
\lipsum \lipsum
\end{document}
I've already looked at a lot of questions and all the answers change not only the first page, but all of the following, as well as changing the format of my title!