It’s pretty darn easy to make soup. Carrots, celery, and onion are cheap and make a base for just about anything. For whatever kind you’re making, the process is broadly the same:
Start with everything chopped into bite-sized pieces.
In a large pot, cook meat of your choice on medium until it is no longer raw.
Add chopped vegetables, stir around on medium heat.
Add chicken, beef, or vegetable stock and seasonings, simmer.
You can do pretty much endless variations.