So far, so good, it sounds like you've done everything right, nice work!
Just FYI, to nitpick your terminology, you really haven't "booted" your PC yet. Booting refers to loading an operating system (Windows, etc) from a storage device (disk drive, etc) into the PC's memory, which then is run by your CPU. What you have done so far is have the PC perform the POST (Power On Self Test) process, which happens before the OS is loaded and run. POST occurs each time you start or restart a PC, and is an essential part of starting a PC. Being able to complete the POST process means all is good with the mother board, CPU, memory, and the basic function of all the devices connected to the board, such as HDDs, video cards, etc.
If you haven't done this yet, you can start the BIOS/UEFI interface now, by pressing the Del or F2 keys a few times after you press the power button. Hopefully you have your mouse and keyboard connected to the PC (did not mention that), so you can access the various screens and options available. I would suggest finding the H/W Monitor screen, which will display the CPU and mother board temperatures, the speed of fans connected to the board, and the three power supply voltages. You want to verify that the CPU temperature is not high (between about 30C - 40C, depending upon your CPU cooler), and that the mother board temperature is normal (less than 35C). Also a great time to learn the BIOS/UEFI interface and the options you have. I assume you have things displaying on your monitor now, you should.
I strongly suggest that you check that your HDD and optical drive are connected to the Intel SATA ports on your board. The two ports at the top of the stack of ports are not Intel, they are the extra ASMedia SATA chip ports, and will not work well before you install your OS. The six SATA ports below the top two are all Intel SATA ports, always use them for your OS drive and frankly any other drives you use, including your optical drive. Check the manual for their location if you are unsure.
Your next step is to install your OS, probably Windows. What version are you using? Here is a guide for installing Windows 7:
Clean Install Windows 7 - Windows 7 Help Forums
Another important detail when installing Windows, do not have any other HDDs or SSDs connected to your board (they could be connected, but do not connect the power cable to the drive(s)) except for the drive that you want to install Windows on. You can of course have your optical drive connected and powered up, I only mean HDDs or SSDs. If you have more than one HDD connected and powered during the Windows installation, Windows will put an important part of the OS installation on one of the other drives, not the one you selected for Windows. The result is you will always need to have both of those drives in the PC for Window to work. This can be fixed later if it happened, but why bother with that if you can avoid it from the start.
You'll probably have more questions, so feel free to ask, and good luck!