I have admittedly limited experience hunting Colorado Merriam's turkeys, but I have been surprised at how few turkeys we found in what appears to be quality habitat. Of course, it depends on where you might be hunting, but E-scouting the areas we hunted was pretty much a waste of time. My suggestion would be to seek information from the state wildlife department (and others) as to where to begin looking...and then spend as much time as you can in the woods between now and turkey season, and with emphasis on the period immediately prior to the season start.
You most likely will be focusing on mountain/forest habitat and in areas where there are roost trees (tall, coniferous-type trees like Ponderosa Pine and the like) and reliable water sources...although Colorado has a lot of those types of areas. For the next month or so, your best bet is to cover ground looking for turkeys and/or sign of them. A week or two prior to the start of the season, focus on being in the woods at the first crack of daylight until sunrise...and in the last half hour before full dark in the evening...listening for gobbling (Merriam's gobblers are notorious for being willing to gobble on the roost at first and last light. Using good locator-call tactics in conjunction with listening will also greatly enhance your chances of finding gobblers to hunt.
As for call types for beginners, I would suggest starting with a friction-type call such as a box call and/or a "pot" call (otherwise known as a "slate call" by many users). Air-operated calls (mouth calls, tube calls, mouth yelpers, etc.) are harder to master but have their advantages (you might choose to begin working towards using those over time).
Good luck with your new turkey-hunting venture. Unfortunately, if you are not careful, you might eventually reach the "addiction" stage like a lot of us here...
