I need to make my website more friendly and editable in our wordpress backend

General information for the website: We are a fitness studio selling fitness packages
Kind of development: Customizations of existing website
Description of requirements/features: We have a good working website.

We need someone to edit our backend so that we can add packages in our 'what we do' page, add new trainers in our 'our trainers' page and also to sort out our blog for us.

We also tend to have a problem where people cannot scroll up and down on our website in some of our pages but in other people's computer, it works fine.

The last thing we need is to migrate the files from our old dedicated hosting to our new hosting so that our website www.fitmibody.com has all its files in the FTP and not having to point to our hold hosting anymore which is www.fitmibody.co.uk. I can give more details upon selecting a winner.

Timeframe for this is asap.
Extra notes:

This is the confirm the following works for £70 -

- Make the website www.fitmibody.com more responsive
- Transfer files via cpanel from www.fitmi.co.uk dedicated server to www.fitmibody.com dedicated server
- Make backend more edit friendly so we can add new trainers when we need to
- Make headers more easily editable via backend so we can add new headers and homepage images easily
- Sort out image problem in blog