Side Bar not showing up on the Main page

Doesn’t look to me like the sidebar is being called in the index.php file of your theme. Is this tag there: <?php get_sidebar(); ?>

your footer is not showing up either. I would suggest fixing some of these errors, then see if it straightens out

https://validator.w3.org/check?uri=http%3A%2F%2Fwww.digitallabz.com%2Fblog%2F&charset=%28detect+automatically%29&doctype=Inline&group=0

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My apologies if this is a legitimate request for help, but I couldn’t help noticing this tidbit on your site, that by the way claims to offer advice on website design. You appear to have a pretty simple problem for someone offering advice to others for money.

the <?php get_sidebar(); ?> is called on the index.php at the bottom of the code along with <?php get_footer(); ?>
Is there any other problem which need to be addressed.