The Lord never lets us down when we step into the unknown at His command. Notice how many times Nephi referred to the "land of promise" or the "promised land." He mentions the "promised land" seven times and "land of promise" seventeen times. Except for Ether, every other reference in the entire Book of Mormon to the Promised Land or the Land of Promise, comes from Nephi. If it is not directly from Nephi himself, it is a quotation or reference back to something that he wrote.
I have such a testimony that the Lord is generous with prophecy. Because of His revelations, we know what will be found at the end of the road, and we know it is going to turn out okay if we keep our heart on the goal. We know that. As King Benjamin said, all that the Lord requires of you is to keep the commandments (Mosiah 2:22). He does not say, "Guess what is in my head." He tells us. We have a living prophet, and we have scriptures. We have personal revelation, which, according to Nephi, are commandments (he uses these words in tandem). Whether the Lord tells you to do something through the prophet or the scriptures or the Holy Ghost, either way it is a commandment and will safely guide us through.
Book of Mormon Central, "How Do Commandments Bring Us Peace and Happiness? (2 Nephi 5:10)," KnoWhy 347 (August 2, 2017).
Book of Mormon Central, "What Does it Really Mean to be Blessed For Keeping the Commandments? (Mosiah 2:41)," KnoWhy 367 (September 26, 2017).