These are all sort of the same thing:
Don't be in a hurry - most new makers just get some steel and start making their first knife. Read ALL the stickys before you do anything on making a knife and you will avoid many first knife mistakes.
Take your time - most first knives are made in a big rush and show it. It takes time to do it right ... and that time will show, too.
Walk before you run - Make the first several knives by hand with a file and sandpaper. Too many new makers run out and buy a grinder and make a forge when they don't even know how to shape a knife. Lots of equipment does not make a good knife ... good skills make a good knife. Those skills have to be learned slowly.
Start simple - Start with a simple drop point hunter or similar small to medium size knife. Leave the daggers and bowies, as well as fancy materials, for later when you have developed more skill.