When and if you are destined to manifest them you will know how. No one can tell you how. You must discover the answers yourself.
No matter what you think your purpose may be; life will decide if you are ready to manifest your dreams and ideas. Until that time comes you will make many decisions in uncertainty and fail often as well.
If the time comes in which you are destined to manifest them you will at first know what you are to do and then everything will fall into place naturally.
Never quit or stop finding your answers, because with each defeat you will know what isn’t working for you.