Bridger Of Light is the name, but crossing it is the game

I have an existing website I am a spiritual healer/reader/and run self development workshops. I had a person I worked with to create the site and it has been on line for one year now, she however died just prior to finishing the back end details. So I am looking for someone whom I can pay to do small job for me, It was created in Joomia, I have an I MAC computer And it is time for renewal of my ssi certificate and site scanner protection has just been renewed, however I do not know how to install the ssi certifcate and then secure the back end. Go- daddy is the host provider but they do not do this. I have managed to keep the site functioning and making additions and deletions on my pages over the last year. But see no reason why I should have to pay someone $1,000 to do one small thing, HELP. Katrece