Don't worry that you don't have all the answers yet. Just Start.
So you have a goal or an idea and you have no idea where or how to achieve it. Does that goal or idea feel larger than you can even accomplish? Does this sound like you? Well it has been me also! And I have learned it's all about the action steps.
"Just start"...something, anything, or make a change, anything that will get you that much closer to your goal. You probably already have the skills to do it and if you don't, get educated on it. There are many many self educating tools out there. There are books galore and tons of information on the internet such as courses or youtube.
You will not have ALL of the answers to the "hows" or "how will I ever" or "how can I (fill in the blank)". With faith and persistence and small action steps your answers will unfold on it's own. I highly recommend the book Atomic Habits by James Clear. This book has given me the tips and guidance to making valuable change or action in my life and goals.
With your goal in mind, make a list of all the actions you can take to get you closer to that goal or dream of yours. Remember, it's focusing on the steps that will get you closer and closer to want you want in life <3