There are several platforms you can explore to find opportunities. Here are some suggestions:
1) Utilize popular job search engines such as Indeed , Glassdoor , LinkedIn, and Simply Hired using your relevant keyword.
2)Reach out to social media and digital marketing agencies. These agencies often have entry-level positions or internships available.
3)Consider Freelance Platforms such as Freelancer, Guru and Toptal.
4)Visit career section of websites of the companies directly.
Remember to built your resume and cover letter, to highlight your relevant skills.

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If you have intermediate experience, why are you looking for an entry-level job? Go for the job that matches your experience. You'll be paid better and have more opportunity to challenge yourself and grow.