How can I convert HTML template into a Wordpress Template?

you have to know custom php development.
-----------
Steps
------------
>Create HTML layout as per word press default theme.
>Select your architecture
>create pages
>then you have integrate that html template into wp theme
>go to theme of wp
>copy the one theme on your HD
>now integrate page by page.

Yes this can be done easily, do you want to create template for custom theme or some premium theme ?

You most likely won't get it to look exactly like your current html site. Best to be clear about that up front. But you can get it close, and because it's an html site, the design could probably use a refresh. I re-create html sites all the time for clients and aside from their sites now being responsive =), they are often pleased with the re-design. Plus it offers a great reason for a marketing push: the re-launching of your site.

Best of luck!

It is possible to convert your old HTML site code into a WordPress website. Static HTML sites still exist, and they still have a place on the modern Web. But if you are not a coding expert and you want to take charge of your site personally; it might be a good idea to move from static HTML to WordPress. That is where WordPress comes into play. WordPress is a content management system designed so that anyone can use it, regardless of skill level. You will not need to hire a developer for WordPress development, and changes are super simple. Manual conversion uses your current site's HTML code as a starting point. If you are going to attempt this conversion method, it is recommended that you have some coding experience. Specifically, you should know HTML and CSS, as well as PHP.
You can read here: https://www.highervisibility.com/blog/converting-html-to-wordpress-step-by-step-tutorial/
Besides if you do have any questions give me a call: https://clarity.fm/joy-brotonath