Best to have a look at what is available already: https://www.google.com/search?client=firefox-b-d&q=prop+art+websitesor go to artstation and enter props in the search.
don't rush, especially when you're just starting out. Take as long you need to make one good prop & learn proper workflow. Learn the capabilities of your software, viewport navigation, hotkeys, the various plugins. Go and press all the buttons, open all the tabs, even brick your software if you need to.
Strongly suggest you start on some props from real world reference and recreate them. Then once you get those basics, get back into those environments. When you make environments, again, try to start from real world reference so you get a better feel of proportions and how things come together.