How to set redirect or change linked url of my page banner/logo

Please I want to redirect my base url for a page in sub domain to another page on my main domain.
I tried redirects in cpanel. Also tried using httaccess but didn’t work properly.
Or if possible I can change the link attached to my logo/banner to another page instead of the base url or say index page.
I’m new to this. Please help.

Thanks.