From nothing to the storefront in four steps.
Reaching Anubis takes four steps, and doing them in order closes most of the ways a first visit goes wrong.
Download Tor Browser only from the official Tor Project site, verify the signature on the first install, and set the security level to Safest. A normal browser cannot open an onion address, and Safest closes the biggest hole by turning scripting off. Anubis works fine at Safest.
Copy an address from the verified list on this page, never type a fifty-six character string by hand. Open it in Tor Browser. The login is a six-tile captcha with a decoy input beside the real one, so read the tiles, type into the visible field, and confirm the address matches before your password.
Anubis Market