, and welcome to the forums! These guys have you on the right track, but when you are new to Linux it is sometimes hard to follow along as many things are different from Windows. You have the right tool now to make your Linux USB... the Universal USB Installer will work fine. But just a few more things for me to ask you to clarify:
Your Linux .iso is more than just "amd64.iso"... it is a longer name that says which distro and what version. Distro names are like Debian, Ubuntu, Linux Mint, Fedora (and hundreds more besides). The version number is different between the different distros, so we would like to know that to help ensure you are installing the latest version, or sometimes NOT
the latest version but instead the LTS
version (long term support) so that you will continue to get updates for several years instead of months.
You didn't say what version of Windows, and that is often important too. Windows 8 and 10 have some special issues (such as fastboot) that doesn't apply to older Windows.
Because you are very new, I can't caution you enough that installing Linux is a risky process... you may encounter problems that will cause your computer not to boot up at all in Windows or Linux. These problems are not permanent, but you may lose data on your hard drive, so it is extremely important that you backup everything that is important. You should also check to see if your Windows version will let you make a "System Recovery" (may be on USB or DVD's). If things get hosed up, you will need this System Recovery to get your Windows back.
To protect yourself from a disaster like I just described, I like to recommend that you boot up on the Linux USB that you will create, and just run Linux in "live mode" for awhile... and don't click the Install icon that you'll find on the Linux desktop. Running Linux on the USB in "live mode" is a little slower than installed to the hard drive, but not much. And when you're done for that session, just shut down the Linux system and remove the USB and your next boot will be back to Windows with no harm done. Another method is to install VirtualBox (free) in your Windows, and then install Linux in VirtualBox. This makes Linux seem more like an app than an operating system, but it will not make damaging changes to your Windows install or hard drive, so it is also a very safe method to start getting your feet wet with Linux.
Whatever you choose, good luck, and welcome to the fun and exciting world of Linux!