I believe what most important is to know what or which felid inspires you. Try to find the field or topic which motivates you or of interest to you and then look for scientists who can guide you through a project or PhD
Your question has many answers, but I would suggest starting reading books like "Advice for a Young Investigator" by Santiago Ramón y Cajal that inspire you for the journey you are about to start.
Many students asked us about how they can start a research project and publish a ... and one does not want these potential wolrd class researchers lost to science ... Once a researcher has worked his way up to an acceptable level, they can go ... a good overview you can decide where you can make your own contribution.
Scientific research is not a day or two day job. It improves through practice. One should write paper on regular basis and gradually improve writing skill. The article will give you few tips:
At first Beginners should learn required latest research related softwares, then select a topic according to there interest, then read lots of literatures and connect with a good research scholar to justify the results and finally do the research.