It is not necessarily about which certification is better, but rather which is more suitable for you at this stage of your career.
The PMP certification is suitable for more experienced project managers who already have 3-5 years of experience leading projects, a secondary degree or four-year degree (this varies depending on your years of project management experience), and 35 hours of project management education.
If you meet these requirements, we would recommend you go for the PMP certification, and prep for the exam with the GoSkills PMP Certification Training course. As the prerequisites are more advanced, the exam topics are more in-depth than for CAPM.
The CAPM certification is ideal for individuals without a lot of project management experience wanting to kickstart their careers and showcase their knowledge to potential employers. If you are new to project management or you do not yet have the necessary work experience, CAPM is a better choice to build up your credentials.
Once you have obtained your CAPM certification, you can gain more project management experience and take the PMP exam at a later date if you choose to.