Wordpress and Woocommerce Expert

I have recently migrated to a Wordpress platform from Squarespace, and have experienced issues such as intermittent downtime and problems with pop-ups no longer working as they should.

I have a lot of plug-ins that state they require updating and when the website is down, I really have no idea what to do to rectify this- as an e-commerce site, every minute we are down costs us money, especially from an advertising perspective where users are hitting a page that is down.

I would like to work with someone on a long term basis, who is very knowledgeable on fixing bugs, making changes (uploading new media to the homepage etc), and assisting with problems when necessary- and to also provide a health check of the current set up and make recommendations. The chosen individual will need to be UK based to ensure we are not restricted by time zones.