How to move Page content more into center/how to get sidebar visible on posts

Hi there

I have two issues I am currently working on (in gravit theme WP version 1.5) and I think they are probably pretty simple but I am still new to this

1) When I go to the blog posts entry area, the right hand side bar has dissapeared entirely (it’s a secondary sidebar/sidebar a) (not sure if I need to change that in a PHP file for the posts or if its changeable in CSS? and what exactly I should place there to get it to pop up again (as it does in the pages)

an example of the blog https://www.talipurkerson.com/category/blog/
an example of a page (about me template) https://www.talipurkerson.com/contact

2) The main content in the left of center (on pages- like the content page above) is still over to the left- is there a way I can get it more centered (move it over to the right about 50 pixels or so?) and remove the space between the main page content and the right sidebar? I have been trying to modify the CSS file to do this but can’t find the exact area of code to do that in.

Thanks so much in advance for any help!