More experienced writers know that writing is a process. Writing is a series of activities that start when you begin thinking about a topic and end when you complete a final draft. Seeing the steps Writing is a recursive activity. As the arrows show, planning is not over as drafting begins, drafting is not over as the major activity shifts to revising, and so forth. In working within the writing process, note what works best for you.
Writing takes time it never happens magically for anyone.
Do not be impatient. Do not get discouraged. In choosing your own topic, do not assume that all subjects are suitable for academic writing. For example, the old reliable essay about a summer vacation is not safe territory unless you were a stunt-double for Bruce Willis's latest action thriller movie. Your essays need to work with issues and concepts.