Which do I need? Dropbox, OneDrive, G Cloud, Google Drive..in words of one syllable if possible..

[Houseofmaidens]

I have an android phone, with which I take all my photos at the mo as weel as doing standard phone stuff, a personal Gmail account, a Home pc with Windows BloodyAwful8 and a work pc with an outlook account(work stuff a bit sensitive and must not be at risk of being accessed by Others). I am also "about" to buy a new camera which I hope to talk to my computer in some as yet poorly understood (by me) but very easy way.More on this on another post.
I need some sort of cloud storage for photos but could also do with being able to access both home and work documents from either/any pc.
I am starting to feel I need a cloud system to do this.. but I am mile behind with understanding what these are, what they do, does one do everything, should I have a separate work/home cloud and what are the risks or all these things?
I accept it will be an exasperating job to explain this to me, but is there a good resource for me to find out?

Google drive.
Dropbox isn't as secure.

Sorted.

Its taken me basically 2 months to get to this point. I've done a lot of research. This is the fruit of it.

Oh and put everything on it. Just is different folders.

And don't stress about upgrading for more storage its £1 a month. And get your phone to update automatically on to it. (But delete the rubbish off as you go)