Resources will vary depending on what you want to use it for:<p>- To use as a general computer, downloading the official OS and following the provided instructions to image to a microSD (or USB flash drive for those Pis capable of booting from USB) might be the easiest. Or if you got a kit that comes with a microSD that already contains the OS, or can get one of those cards, would remove the need to create your own. BTW, You may want to try a lighter distro if you have an older Pi (3 or older), or Pi Zero, because the full version can be slow to load on those Raspberries.<p>Any particular use case that you are interested in? Also, what Raspberry Pi are you using?
I don't really care for the 3.3 volt I/O of the Pi, but here's a good overview of the interfacing available.<p><a href="https://learn.sparkfun.com/tutorials/introduction-to-the-raspberry-pi-gpio-and-physical-computing/gpio-pins-overview" rel="nofollow">https://learn.sparkfun.com/tutorials/introduction-to-the-ras...</a>
There are a bunch of free guides available at: <a href="https://learn.littlebirdelectronics.com.au/categories/raspberry-pi" rel="nofollow">https://learn.littlebirdelectronics.com.au/categories/raspbe...</a>
Monitor, mouse, keyboard and treating it like just another computer might be a reasonable way to start.<p>Or not depending on what you are trying to start and your relevant experience.