+1 for a stick blender. It's waaaaaaay easier to clean.
Soup is really easy, doesn't have to be complicated. The most basic I make is just a simple vegetable soup.
1 onion
2 cloves garlic
2 good-sized carrots
2 large sticks celery
1 leek
1 parsnip
tablespoon vegetable oil
2 stock cubes
1 bay leaf
1 tsp dried mixed herbs
Dice / chop the veg, sweat off in the oil with the bay leaf and herbs. When the onion and leek are translucent, add about 2/3 of a kettle of boiling water, the stock cubes and some freshly ground black pepper to taste. Simmer for about 20 mins.
You can also add some small pasta shapes (broken up spaghetti will do), some diced potato or some pearl barley. If you've some leftover meat bones, throw those in while cooking, as they'll add a really good flavour.
I make loads of soups during the colder months, usually dictated by whatever veg I've got in / want using. I don't always blend soups, it just depends on my mood. If I want a thicker soup without blending, I'll throw in half a cup of red lentils. Likewise, if you want creaminess *without* adding cream, then add a floury potato (e.g. maris piper) into the mix.
Other favourite soups here are:
Carrot, sweet potato & red lentil (I'll add thai red curry paste to this sometimes, and creamed coconut)
Leek & potato
Minestrone
Curried parsnip
Polish beetroot soup (Barszcz)
Roast pumpkin
Cullen skink
Potato, bacon & sweetcorn chowder
Dhal (curried red lentil)
Cauliflower & potato
TBH, you don't need anything fancy to make soup. As long as you've got stock cubes and dried mixed herbs, any vegetables will do. It's a good way of using up tired old veg. There's a common misconception that soup is hard to make and needs poncy ingredients. Couldn't be further from the truth.