First I'm somewhat confused as to what do do after writing the image to disk and booting up, because obviously the full wiki on setting up applies to full PC version, so once I'm at the promt I'm unsure of where to go from there, what is set up, what is not, with my laptop, after going through the install process, rebooting and arriving at the prompt, I knew what I had. Doing pacman -Syu is not working - some errors about certificates and not reaching mirrors. However I reinstalled base-devel with pacman -S base-devel just fine

I have a EW-7811Un nano wireless module and I'm unsure about setting it up too, older threads where people have managed this was back when the ArchARM still used rc.conf way of doing things and I wondered if since then there's a package or other way to get it running, I know on the debain distro it just works out the box now, whereas before it did not, will the modules in the AUR work (dkms-8192cu)?.
Thanks,
Ben W.