dannat - i think it's fab that you want to do more home cooking. good on you
bundle's rice method is the best - works every time for us. if you can afford to then i recommend using basmati for everything as it is much less prone to gloopy sticking together than long grain.
an easy recipe i love is veg chilli as you don't really need a recipe and you can freeze it then reheat in microwave, plus it is really really healthy as it has so many veggies in. great with rice, baked potatoes or in tortillas with guacamole, salsa, cheddar cheese
buy a selection of veggies you like the look of - i usually use onions, carrots, mushrooms, peppers, courgettes, cauliflower, tin of sweetcorn. also things like squash, celery, sweet potato are good. get a good mix of colours to make it look appealing.
chop all veg into bite sized pieces. heat a good glug of veg oil in a big pan, gently fry the harder veggies (onions, carrots, peppers, celery, squash etc) until they soften. if you have a gas hob have it on medium. then add the other veggies. add about a tablespoon of tomato puree, a tin of tomatoes, a tin of chilli beans (kidney beans in chilli sauce - most supermarkets do them) and if you want it a bit hotter then a pinch of chilli powder. simmer for about 30 mins or so until veggies are soft.
you may need to adjust the tomatoes/beans depending on how many veggies you have - take a look at it as you add the tomatoes and beans and see whether you think it needs to be wetter. you can't really go wrong flavourwise on this, so it is worth just experimenting to get a recipe that works for you.
libraries have great selections of recipes - books by delia smith, or things like readers digest books as they are usually very simple recipes. also soup is really easy to make and very nutritious, and freezes really well, so maybe a soup book is a good idea.
waitrose.com and deliaonline.com have a load of recipes to look through which will inspire you.
my store cupboard essentials are onions, carrots, celery (all three together make a great base for tomato sauces, soups etc.), tinned tomatoes, tomato puree, salt, pepper, mixed italian herbs, soy sauce. then rice, pasta and couscous as well.
good luck!