Hi Rockninja, welcome to the forums! Make yourself right at home browsing around too, we have tons of info to help you get started in the field on the right track.
You'll want to definitely check out the
"Small Scale Mining, truths or myths" thread found in the Valuable references section of the forum.
Another good one that could help you find some open land to prospect/collect on would be the
"How do I Avoid Claim Jumping" thred found pinned in this section (Prospectors and Rockhounding Field work) pinned at the top.....has some good tips to help out anyone in the field.
Good luck out there and welcome to the world of prospecting too, it's a blast in Colorado with all the possible finds around the state.