Perhaps a sales engineer?
> I am just much more comfortable supporting existing software than building new software.
Having technical skills is required, but you'd be doing little to no coding or design work.
> Being an interface between business and tech.
A sales engineer matches this almost by definition.
> Just working with people in general!
The job is essentially entirely about working with people, both with the customers you're trying to sell to, and with the developers who are actually making the product.