To customize a template you have to know your way around HTML and CSS. For example, to change the color of the template, most likely you will need to alter the color hex code in one of the CSS rules.
To swap out an image (such as a place holder logo with your own logo), you need to search for the "img" tag and alter the "src" tag.

A website has to be nice, easy to use, and if you think at SEO it has to be easy to crawl by search engines. A good idea is to follow some tips like: use more css than tables. SE's aren't really fans of tables, they like more css.
For example a page with many tables will have a source file very large, this will affect the bandwith so the end users will have to wait more until the page loads.
Using more CSS you will see the results immediately like your page will load faster, will be more attractive for visitors.
If you want in future to redesign your site you can do it easier, and will get better results in search engines.

Hi,

You may add your links on these website which are following here.


Thank you,
Regards,
Pakistan Boy