Where do I begin?

I am new to this site and newish to vegetable gardening, and have just moved to North Staffordshire from North Yorkshire, where we have a big enough garden for me to grow a few veggies and some fruit.

However, there are only the two of us (with daughter, OH and baby nearby) so we don't need HUGE amounts of vegetables. I would love some salad potatoes, runner beans, courgettes, strawberries etc but only need a few plants of each and all the garden centres and suppliers seem to supply things like potatoes in large quantities. I reckon I only need about three potato plants!!! We have also tested our soil and it comes out slightly acidic.

So two questions here:

Does anyone know where I should look to buy smaller quantities of things without it costing a fortune (packets of seeds are not a problem, its things like potatoes etc.)

And, are there certain varieties of vegetables and fruit which grow well (or less well) on soil which is slightly acidic?

Thanks - didn't know we had a store near us but I see there is one in Crewe. Will go and have a look. I could at least split a bag of 10 potatoes between my little plot and a few containers which I can give to DD and DSIL to grow in their backyard!

Oooooh! I forgot we have an Aldi nearby!!! Never had one where I used to live so I tend to forget about them. I will have a look in there tomorrow when I visit my daughter. Thanks for the link too. Looks interesting. Hmmmm, I am having too many ideas about what to grow - think my vegetable plot needs to be bigger now - OH had better watch out or I will be taking over his "parks and gardens" plot!