\documentclass[10pt, a4paper, titlepage]{article}
\usepackage{graphicx, latexsym}
\usepackage{setspace} 
\usepackage{apalike}
\usepackage{amssymb, amsmath, amsthm}
\usepackage{bm}
\usepackage{epstopdf}
\usepackage[]{hyperref}
\hypersetup{
    pdftitle={title of the pdf},
    pdfauthor={your name},
    pdfsubject={cool stuff},
    pdfkeywords={koala, chuck norris},
    bookmarksnumbered=true,     
    bookmarksopen=true,         
    bookmarksopenlevel=1,       
    colorlinks=true,            
    pdfstartview=Fit,           
    pdfpagemode=UseOutlines,      
    pdfpagelayout=TwoPageRight
}

\singlespacing
%\onehalfspacing
%\doublespacing



\title{title of your paper\\ \small subtitle of your paper}
\author{name}
\date{\today}
%\date{}

\begin{document}
\maketitle
\newpage

\section*{Abstract}

text of abstract text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text 

text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text

\section{Introduction}
text introduction

\subsection{sub introduction}
text text text



\end{document}

