Here is the first task. Notice: It is very important to be extremely attentive when making changes to .htaccess file.
If after making changes your site stops functioning, do the following:
Step #1: Open .htaccess file in the root directory of the WordPress install and delete everything between the following two lines
# BEGIN HTTPS Redirection Plugin
# END HTTPS Redirection Plugin
Step #2: Save the htaccess file (this will erase any change this plugin made to that file).
Step #3: Deactivate the plugin or rename this plugin's folder (which will deactivate the plugin).
The changes will be applied immediately after saving the changes, if you are not sure - do not click the "Save changes" button.
Second task - see upload