Hey @Shopper727 it really is a case of trial and error to be honest.
When I made my soup yesterday, I had to answer the phone, so I cooked the veg for about 30 mins and that has made the soup sweeter because of the caramelisation - still tasted good!
Think of flavour combinations that you like and then break it down into a recipe.
For example:- potato and leek soup.
Start with the same quantity of each, add an onion. Soften the veg and then add stock. Try it with a veg stock first and then maybe try it with a chicken stock.
Taste and keep tasting to see what you need to add. If you add to much pepper, add a few extra potatoes. Don't want to add salt - use cheese or bacon. Want it creamy, add a swirl of cream, knob of butter.
Also, if your on a tight budget look for reduced veg as this can reduce costs considerably and the over riped veg will add to depth of flavour. I use supermarket stock cubes as these are a lot cheaper and when you get more confident upgrade to the pots or make your own.
Get a notebook and start keeping recipes in it, especially from supermarket magazines or ask friends and family for their recipes.
Most importantly, have fun and enjoy it.
Good luck!!