Hi,
do you use contact form 7 or any mailing software like mailpoet?
https://www.ads-software.com/plugins/wysija-newsletters/
They have shortcodes and ready to use forms you can embed in the subscription field.
Anyway, here is a non styled aweber formular you can use, but i suggest that you install cf7 or mailpoet and create a new form.
<form style="padding: 3px; text-align: center;" action="" method="post" class="email-subscription">
<strong class="title" style="font-size:18px">Sign up for our best stuff:</strong><div style="display: none;"><input name="meta_web_form_id" type="hidden" value="241295243" />
<input name="meta_split_id" type="hidden" value="" />
<input name="listname" type="hidden" value="awlist3547415" />
<input id="redirect_5421e06a1fb1d162c05cc64ae329ac0f" name="redirect" type="hidden" value="https://yourwebsite.com/thank-you/" />
<input name="meta_adtracking" type="hidden" value="SubscribePage_1" />
<input name="meta_message" type="hidden" value="1" />
<input name="meta_required" type="hidden" value="email" />
<input name="meta_tooltip" type="hidden" value="" /></div>
<input class="email" style="width: 190px;padding:7px;" tabindex="502" name="email" type="text" />
<input style="margin-top: 18px;" tabindex="503" name="submit" type="submit" value="Subscribe" />
<div style="display: none;"><img src="https://forms.aweber.com/form/displays.htm?id=TCyMTJysTCzM" alt="" /></div>
</form>
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