left sid nav bar… Is it possible

There are thousands of templates hundreds of which have left side widget bars which you can customise to put your navigation into. There are also many lightbox plugins available. https://www.ads-software.com/extend/plugins/lightbox-plus/screenshots/

If you want something more specific design your own theme or pay a designer to make you one.

Searching for “menu in left sidebar” finds quite a few:

https://www.ads-software.com/extend/themes/search.php?q=menu+in+left+sidebar

You’ll have to look for the other layout you want. But also note that both of these could be added to almost any themes as customizations — though you’d need to know some HTML/CSS and maybe PHP to do so.