You should try reaching out directly to companies on LinkedIn instead of just submitting applications online. Contact companies you’re interested in and briefly introduce yourself, mention the internship you’re applying for, and attach your resume. This gives a more personal touch and increases your chances.

Practice as much as possible. The more samples you test, the sooner you’ll gain confidence and accuracy. Start with dummy samples first if needed.

You have lots of options after 12th. You can go for undergraduate programs in engineering, medicine, commerce, humanities etc. It all depends on your interests and skills.