Is WordPress appropriate for this project?

Hello, I am currently starting on a project and I am considering my options.

This is a project for a dementia charity. The idea is to collect memories from people with early dementia in order to keep those memories safe and recall them later on.

I’m looking to make a website with a front page containing news about the project – which wordpress would be ideal for.

The core of the project allows users to create an account and use it to store memories – these will consist of text, images and youTube clips. Music is a big part of the project because music helps stimulate memories more than many other things.

So I want users to be able to upload these things, not as a straight forward blog posts, but as a private memory bank only they (and future carers) will have access to.

I want to know if this is the sort of project I could use WordPress as a CMS for or would I be better building something from scratch. Obviously I want to be able to hand over the project at some stage so having a CMS would allow other to make changes to the pages without recoding them.