Sorry I didn't the snippets are only available for 24 hours or little more. They should extend that.
So finally I got it right! Uffa!
So basically I did one little change to the html code actually, and it worked.
Here was the code:
<div id="h">
<div class="container">
<div class="row">
<div class="col-md-8 col-md-offset-2">
<h1>Vem aí a 99 <bold>FITNESS</bold></h1>
<h3>Em breve o maior aplicativo de fitness do Brasil</h3>
<div class="col-md-6 col-md-offset-3">
<form role="form" action="{% url 'home' %}" method="post" enctype="plain">{% csrf_token %}
<input type="email" name="email" id="u_email" class="subscribe-input" placeholder="Coloque seu e-mail..." required>
<button class='btn btn-conf btn-go' type="submit">Quero ser avisado e virar vip!</button>
</form>
I changed the action="/signup/" to action="{% url 'home'%}" and it start saving the input to database.
Now my question is... because it wasn't a django code it wasn't working or because I was passing the wrong html page? Because actually signup is the page right after the form action, after the user submits the input. Do I always have to specify the actions form forms in django code like that?
I tried using "/home/" instead and gave me an error.
Anyway I'm happy finally this simple thing is done! Thanks for the help btw