how can i formally start and essay about a certain interest? Any suggestions?

I am uncertain of your "certain interest"

There is nothing wrong with opening with some drama...such as

Beekeeping has been my life for forty years.
or
War is hell.
or
Stamps can open a new world.

That depends upon the purpose of your essay.

Also -- the introduction is the LAST thing you should write. You need to know exactly what you've said in the body of the paper before you decide how you'll introduce it.

You also need to incorporate your thesis statement in the introduction to your essay.

To formally start an essay about a certain interest, you can follow these steps:

1. Hook the reader: Begin with an attention-grabbing opening sentence to capture the reader's interest. It could be a thought-provoking statement, an intriguing fact, a relevant quote, or an anecdote related to your interest.

2. Provide background information: Give a brief overview of your interest, explaining what it is and why it holds your attention. This will set the context and introduce your readers to the subject.

3. State your thesis statement: Clearly state in one or two sentences the main point or argument you will be making in your essay. This thesis statement will guide the reader throughout your essay and help them understand your focus.

4. Outline your essay's structure: Briefly outline the main points or sections you will cover in the body of your essay. This provides a roadmap for the reader and helps them anticipate what is to come.

5. Provide a transition: Finally, smoothly transition from your introduction to the body paragraphs of your essay. You can do this by summarizing the main points you will discuss or posing questions that you will answer in the subsequent sections.

Remember, the introduction should be attention-grabbing, clear, and concise. It sets the tone and framework for the rest of your essay, so it is important to take time to write an impactful opening.