WP Site needs some minor maintenance and updates

Hi All, Our website is [login to view URL] (Wordpress, MyStile, WooCommerce). It has already been built and is up and running. There just some minor tasks we would like to clean up, update, and add on. If you are a good developer who knows language/coding/css, etc, with Wordpress, we have a few simple tasks we need to get completed and can be done in 1-2 days. We will need to be shown how to make these changes so we can make them in the future (via Skype - Sharing screens). 1) We are having trouble making edits on our WP dashboard. It seems the edit function is disabled in Chrome. We need to know why. 2) We need to update our WP site and plugins so there are no issues with infections, malware, etc. Before that, we need to make a copy of the source code and know how to upload it to server/hoster. 3) We have a Minimum Order Limit of $100 we would like to change down to $80.00. But more importantly, we need to be shown step by step how to make these changes so we can make them in the future. Maybe something like a textbox on WP admin. Additionally, we would like to know if we can have differently 'Minimum Order Limits' on different days. 4) We need to add an option on the Cart/Checkout page that allows customer to choose delivery time they want. And if they order when we are closed, the delivery time gets pushed to following business day. 5) We want to make a couple changes on the email orders customer receive as well. If you are interested, please let us know. We will pay you when all tasks are completed. If we are successful, we will like to keep using you for website maintenance for the future. Please don't bid unless you can do it as we want. Thank you very much. Sincerely, Mighty Claws