Customize wordpress website

The website is already running, it's [login to view URL] 1. Set a delivery fixed cost (50€) at the end of customer validation cart. 2. Enable https protocol (We have already let's encrypt certificate installed on webmin.) 3. Allow on the register form to add 2 required attachments. The names of the fields are : “Extrait de KBIS” and “ Votre RIB” 4. All products images do not display correctly 5. Only allow access to the site after manual account validation : The site is only accessible to our customers. For this, they must first create an account by completing a form. At this moment, they still do not have access to the website. The validation email it send to marketing@[login to view URL] . Please, let us know later how we can change the email address. Then we check the information given and validate the account manually. Only after this step that the customer will have full access to the website and its content. For now on the current site, only the login / register form are enabled. So, we must therefore set up a system that blocks access to the content of the website until our manual account validation. 6. Allow to import data related to the Unite Per Cartons : Our products are sold by cartons (see attachment "screen-01"). We want to import these datas (Unite Per Cartons ) into the database so that the customer is obliged to order a minimum of quantity equivalent to the carton. If he wants to order more it has to be a multiple of the carton. 7. There are elements on the website that cannot be translated into French (see below screenshots). (frontend login Ok). 8. Next to the sentence "Strength indicator" (see below screenshots), we need to indicate the authorized symbols so that the password is complete (like Az09!% @ #) 9. We need to change some graphic elements of basic installed theme (like color, according to the logotype colors) , let you know later. 10. We cannot update the wordpress modules (authorization problems)