Help updating my Wordpress Website

General information for the website: Emotional support and tools for motherhood
Kind of development: Customization of existing website
Description of every page/module: www.babyjourney.com
Description of requirements/features: Update existing wordpress website. Structure of homepage to remain the same but fairly major changes including updating menu structures and images.

Improve Media Section and upload pdfs and video clips.

Improve blog and include vlog posts

Improve online shop and convert to paypal with currency in pounds

Additional testimonials to be added with scrolling images. Timing on scrolling images to be adjusted.

That's the bulk of it. I would like to be able to learn how to update myself so that I can sort content management regularly.
Extra services needed: Customization, Optimization
Extra notes: