will i lose Seo ranking if i change my existing theme into Enfold?

Hi Josue,
Sorry for the delay i was off for a vacation.Good to hear that, how should the logo be changed i mean in what way.?I am not so familiar with the seo things, but after some researching i found the ranking will take time to retrieve its previous position once it is lost due to change in the structure(while migrating to a new theme). If possible please can you guide me on specific things i need to change and the exact directions for that.
Thanks :)

Hi,
Just for confirmation (as i cannot afford to make a mistake :( )
1) Need to use the following for changing image structure right?
In header.php replace:

echo avia_logo(AVIA_BASE_URL.’images/layout/logo.png’, false, ‘strong’);
with:

echo avia_logo(AVIA_BASE_URL.’images/layout/logo.png’, false, ‘h1’);

2)Need to use the following for changing page title right?

add following code to functions.php:

add_filter(‘avf_title_args’, ‘fix_single_post_title’, 10, 2);
function fix_single_post_title($args,$id)
{
if ( is_single() )
{
$args[‘title’] = get_the_title($id);
}

return $args;
}
I have taken the All contents backup with wp export within tools as well as using xcloner plugin that will be enough for backup right?