Tutorial (or handholding) needed for Microsoft products

I have been with this company for a year. It is a family partnership (not legally, but practically) and they have always filled in each others weak spots. One weak spot was technology and as they have grown they did not change to meet their needs. Another was the lack of shared space for physical files and notes ( in my truck, in a box in his basement, on my phone). They utilize Apple - Microsoft - Dropbox - Google - independent apps and share log ins and passwords (until they don't). Their past MO has been to identify a problem and buy a solution without integration. As their first office manager, I was encouraged to bring everything into one place, both physically and digitally. To that end, I convinced them they needed to convert to Microsoft products and they did. Now I am in over my head, working from home and would like to get things pulled together so that we can function more efficiently. One additional problem I have is that there is no plan or communication so expectations and the wish list changes almost daily. I am looking for a group to help me talk (vent) and plan about the companies needs that will use the right language so that I can find help. I also want to be able to ask my employer questions to get a plan in place. I don't mind researching or reading tutorials but I feel overwhelmed and want to be sure I am building a good foundation. I'm not afraid of tech, but I am afraid of misusing it. Can anyone help mentor me?