If possible, have a scientist review the procedure with you. Sometimes the designer of an experiment can miss the obvious. No matter what happens, you will learn something. Even if your experiments don't answer your questions, they will provide ideas that can be used to design other experiments. Knowing that something didn't work, is actually knowing quite a lot.
Unsuccessful experiments are an important step in finding an answer.
Even so, their results are valuable. Eventually, someone will use their work to find the answer.