Not all of us grew up on a farm, have a background in farming, or studied agriculture in college. A mentor comes in to help such a farmer gain some hands-on training. Countless websites can link you with a mentor based on your location.
If you spend enough time at the feed store, you're bound to run into someone who wants to talk shop. That's a good way to find a mentor in a rural area, at least in my experience. Finding the right mentor takes time because you have to build the relationship.