How do i tweak my wp Post title base on category of the post

You can add a filter in the title like:

add_filter('the_title', function ($title) {

if (is_single()) {
    $categories = get_the_category(get_the_ID());
    // Assuming the post has many categories will take the first
    $category = reset($categories);
    return $category->name .' - '.$title;
}
return $title;
});