I keep being told that tomatoes won't do well unless in a hot house.
we were successfully growing tomatoes in ground before - they need to be planted out in the middle of may as even slight frost will kill them - all you need is to feed them significantly (and water profusely when it's hot) (I am not encouraging you to use artificial fertilizers but if you have no other choice then what can you do) - you also need to PRUNE them (sort of I'm not an expert on this - you need to have only one main stem) -
cucumbers will do well when covered with semi-transparent tissue (they like it warm and humid and as they produce a mass of foliage less sunlight is not a problem) (I don't know the right name for it in English) - it's włóknina in Polish - they need plenty of water too and will strive on compost and nitrogen rich soil
there are vegs that like company of each other and combinations that are harmful - lettuce will grow well next to radishes , lettuce won't mind the company of cucumbers so you can plant them on the borders of the cucumber plot - the lettuce will be mostly gone by the time cucumbers will start overgrowing it - some vegs don't like the company of onions
if you plant strawberry plants this spring all you will have this year is going to be a single or two fruits a small plant (if any) - but they will be surprisingly big (depending on varieties - one variety I can wholeheartedly recommend is Senga sengana - it has delicious sweet intensively coloured and fragrant fruits that are equally good fresh, frozen and in all kind of preserves
(I have no idea what square foot gardening is TBH)
as for pigwa I think they need a couple of years before they bear any significant fruit - the tree needs to be strong simply
think about green peas - they are quite simple and tolerant and wonderfully sweet and tasty when harvested in the right time (children love them) (then they turn hard and bitter) - all you need is a good bunch of sticks sticked along their lines (twigs) so they can climb a bit
ah if you never planted any dill be sure to try to sow some - some people love dill some hate it AFAIK - for me dill is lovely with new young potatoes - you just boil young potatoes and them fry them on a pan with chopped dill - the aroma is heavenly and the taste of the potatoes greatly enhanced - dill can actually fare very well scattered among rows of other vegetables - dill flowers are essential in dill pickle making (though the main ingredient is cucumbers)