Why is that when I define a pagestyle with fancyhdr it's shown different for the first page and the others?

So I am trying to define a style for a work I have to do and I wanted to put two images for header and the page number in the foot of each page. And my code seems to so, but the first page is shown different than the others. In the first one, the header is closer to text than in the other pages and also the page number is shown upper than in the other pages. Why is this if I am using the same pagestyle for all the pages? Thank you in advance. Any answer is very much aprecciated. I’ll paste my code right under:

documentclass[12pt,a4paper, notitlepage]{article}
usepackage[utf8]{inputenc}
usepackage[spanish]{babel}
usepackage{amsmath}
usepackage{amsfonts}
usepackage{amssymb}
usepackage{graphicx}
usepackage{float}
usepackage[
  top=2cm,
  bottom=2cm,
  left=2.5cm,
  right=2.5cm,
  headheight=1cm,
  includehead,includefoot,
  heightrounded, 
]{geometry}
%usepackage{multicol}
usepackage{lscape}
usepackage{hyperref}
usepackage{caption}
usepackage{subcaption}
usepackage{fancyhdr}


%definimos un estilo de página para usarlo luego (le ponemos nombre):
fancypagestyle{myfancy}{%
    fancyhf{}
    renewcommand{headrulewidth}{0pt}
    renewcommand{footrulewidth}{0pt}
    fancyhead[L]{includegraphics[width=4cm, height=1.5cm]{seccion-fisica-original.png}}
    fancyhead[R]{includegraphics[width=3cm, height=1.5cm]{logotipo-IEO.Captura-web.png}}
    fancyfoot[R]{thepage}
}

%abrimos el documento y hacemos la portada:
begin{document}
begin{titlepage}

centering
begin{figure}[!tbp]
  begin{subfigure}[b]{5cm}
    includegraphics[width=8cm, height=3cm]{seccion-fisica-original.png}
  end{subfigure}
  hfill
  begin{subfigure}[b]{5cm}
    includegraphics[width=5cm, height=2.5cm]{logotipo-IEO.Captura-web.png}
  end{subfigure}
end{figure}




{bfseriesLARGE Universidad de La Lagunapar}
vspace{0.5cm}
{scshapeLarge Facultad de Ciencias: Sección de Física par}
vspace{3cm}
rule{linewidth}{0.4mm}
{scshapeHuge Memoria pr'acticas externas par}
rule{linewidth}{0.4mm}

vspace{8cm}
{Large José María Ramos Fernández par}
{Large Junio 2021 par}
end{titlepage}

newpage
pagestyle{myfancy}
section*{ALBERTO}