Welcome aboard. I would echo what others have said, buy a good used bow to get you started, preferably a low poundage one so that you can work on form. Your first few attempts, if you are anything like me, will be learning experiences but may not be shooting experiences...at least not for very long.
I would not call them failures, although they did fail to produce a working bow or at least one that lasted long. Each one taught me something about the bowyer's art. I haven't attempted one lately, but may do so in the near future. Right now I am planning on a quiver build, along with building some furniture in my workshop, so no time for a bow at the moment.
I would encourage you to build your bow(s), but don't wait until they are done to begin enjoying traditional archery.