This is not how form-mail works.
Generally any such form will utilise some type of back-end or server-side scripting to process the submission, such as PHP.
If on the other hand you just want a link to your email, that can be done using the <a> tag with mailto in the href like you have, only without any form input within it. The downside of that is it does not protect from spam. As you have it, the address is there in the visible code, so is vulnerable to spam, so no point in using a form in such a way.
If you are not confident enough with server-side scripting to create your own processing script, you could use a pre-made script such as this one:-
We appreciate your willingness to help, @enpriya, but you need to remember that many people reading these topics will be complete beginners, and may be misled or confused by partial solutions. If you’re posting code, please ensure it is valid and usable “as is”, without the need for extra knowledge.
As @SamA74 says, there are various ready-made options available to use, which may be more suitable for a beginner.