Navigating the web with a loved one who has dementia is definitly a challenge! My sister calls me everyday to ask me how to do things ( like take a screenshot, or find her pictures etc). The problem arises when she decides to try and fix something herself. Then I have to figure out what she did and try to undo it. Occasionally, because she also has paranoia she will hit forgot my password and change it without writing it down. Ugh:( she really enjoys looking at utube videos, and the family has a group text that she is on. If I take away her cell phone and computer, then she loses those connections. But on the other hand, she is clicking on a lot of spam. We both have android phones, so the iPhone suggestion from clewis won't work for me. I still haven't found a way to restrict her phone and computer to only specific sites . I wish I had the skills to develop something like that.
In terms of taking over things, it is very hard because they need to be functional and do things. I took over in baby steps. For example: we balanced her checkbook together and she only wrote checks when I was there .( even thought it took 3 times longer to complete) Eventually, she was too confused and angry, so I took it over completely. The balance is hard and time consuming, but it helps them feel useful and capable. I feel your pain. Hang in there! We are all in this together and we do what we can for our loved ones. You are doing all you can and that is enough. There is no right or wrong here. My standard thought is, what would I want someone to do, if the roles were reversed and I act accordingly.