Garden Planning Help Please

Hello all, first post from a new member wanting some advice on how best to plan our fruit and veg garden.

We have a fairly long but narrow garden, currently split into 4 areas including 2 lawns and a pond, we also have a 6 year old child and a rowdy dog but have decided we want to start growing our own.

I have uploaded a video of our garden taken earlier today onto youtube, so people can see the layout. We would be interested in growing everyday things such as:

Carrots
Spuds
Beetroot
Lettuce
Strawberries
Blackberries
Rasberries

We currently have a few pots growing herbs and a failing strawberry plant. Does anybody have any advise as to how we could plan the garden?

We would ideally want to use the bottom part of the garden (furthest away from the house) for growing and keep the area at the bottom of the steps as it is (but could use the deck area for pots), and need to take into account the kids playing and the dog when planning things.

Does anybody have any advise for us please?

The video can be found here:

Our Garden - YouTube

thanks in advance