We need a bit more information to offer effective suggestions, but no software is Idiot Proof.
Assuming you are seeking Genealogy Software, Roots Magic, Family Tree Maker, Reunion, MacFamilyTree are all the ones that we have on our MacBook. I cannot comment on other Apps other than some like Legacy and Family Historian do not have versions for the MacOS, they can be used but they need a Third Party App to enable them to function.
There are Pros and Cons with each.
Both Roots Magic and Family Tree Maker can download and sync a Family Tree in full, including documents and media off Ancestry. The error checking tools in Roots Magic are very useful and simple to use.
Using a Gedcom to create a Family Tree in software does not include documents and media, just the references, so a big plus for the feature in the software.
Word Processing and Spreadsheet software is free, Pages and Numbers are in the App Store. Presentation software such as Keynote is also free as is other of Apples own software.