BuddyPress.org

No WP is still the default until you redirect visitors through some code in your functions.php

To make your activity page the default after login add following code to your child themes functions.php:

define( 'BP_DEFAULT_COMPONENT', 'activity' );

function login_redirect( $redirect_to, $request, $user ){

    return home_url('activity');

}

add_filter( 'login_redirect', 'login_redirect', 10, 3 );

If you want to direct to profile page then change activity to profile.