If you want to send emails from a form, it would be nice to know about server-side scripting.
First, I found out what software you installed on your current server. For example: this is a Linux server with Apache, MySQL, PHP, Perl, etc. Or is it a Windows server with ASP.Net etc. You can find this from your host provider.
For security reasons, I would not recommend writing your own script to send emails until you know what you are doing. There are freely available scripts that do this well.
Tectite FormMail is one example if you have PHP
Then you will need to upload the necessary scripts to the web server. Typically, FTP access to the server is provided for this task. And use the appropriate HTML to link to the script.
As an alternative:
There are options for forms that can be verified, so you no longer need to understand server scripts. (this means that some other web server does all the email that you manage is HTML)
Below is a list of several hosted options.
Edit: Here is the best list of posted options.
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