Here are some tips on how to be prepared to major in mechanical engineering in high school:

• Take math and science classes. This is essential, as mechanical engineering is a very math- and science-intensive field. You should take as many math and science classes as you can in high school, including calculus, physics, chemistry, and biology.
• Get involved in engineering-related extracurricular activities. This could include joining the robotics team, participating in engineering competitions, or volunteering at an engineering firm. Getting involved in these activities will give you hands-on experience with engineering and help you develop your skills.
• Learn about different engineering disciplines. Mechanical engineering is a broad field, and there are many different subdisciplines within it. You should learn about different engineering disciplines so that you can find one that interests you and that is a good fit for your skills and interests.
• Shadow a mechanical engineer. This is a great way to get a firsthand look at what a mechanical engineer does on a daily basis. You can shadow a mechanical engineer at their workplace or at a career fair.
• Do research on mechanical engineering schools. Once you decide that you want to major in mechanical engineering, you should start researching schools. There are many great mechanical engineering schools out there, so you should take your time and find one that is a good fit for you.

Here are some additional tips that you can follow:

• Develop your problem-solving skills. Mechanical engineers need to be able to solve problems effectively. You can develop your problem-solving skills by taking math and science classes, participating in engineering competitions, and working on engineering projects.
• Be creative. Mechanical engineers need to be creative in order to come up with new and innovative solutions to problems. You can develop your creativity by taking art classes, participating in engineering design challenges, and working on engineering projects.
• Be organized. Mechanical engineers need to be able to manage their time and keep track of their work. You can develop your organizational skills by taking time management classes, using project management software, and creating to-do lists.
• Be a good communicator. Mechanical engineers need to be able to communicate effectively with their peers, their supervisors, and their clients. You can develop your communication skills by taking public speaking classes, participating in debate clubs, and writing technical reports.