I presume this is the free "upgrade" from an older version of Windows, like 7, 8, or 8.1? It should have come up looking almost exactly like whatever you had before, same icons on the screen, in the same places, same wallpaper image if you had one, etc. Everything you had before will still be there unless something's gone horribly wrong, always a possibility with Windows. If you click up the Start button in the lower left corner you should see a scaled down version of the tiled interface introduced with version 8, all installed software should be in there somewhere, just poke around in it a bit and see what you can find. And if you don't see that tiled interface, something HAS gone horribly wrong.
Personally I recommend giving up on Windows now, Windows 10 is a major invasion of privacy, monitors everything you do and reports back to Microsoft, I'm convinced at the behest of U.S. security agencies. Stick with whatever previous version you were using, and when support for that ends, switch to Linux. Or Apple. The Linux distribution called Mint is the most Windows-like of them, and if you really MUST have Windows, run it as a virtual machine in Oracle's Virtual Box product. That's what I've done, I've got Mint v17.3 with Virtual Box installed, and virtual machines inside it for XP, Win7, 8.1, and 10, all tightly wrapped up so they can't report to Microsoft. Only caveat there is you must have at least 8 Gb of RAM to get usable performance out of the virtual machines.