I only have ~1 year experience in infosec, finished a CS/SE university and got Security+ certification, but I’ve been promoted to a Junior Penetration Tester role. In my opinion, the easiest way to get into pentesting is by having a background in security.
This can be easiest to accomplish by having a job in cybersecurity, best of which would be Level 1 Security Analyst. It would also give you high chances if you hold a certification like OSCP, which can assure the employer that you have some practical skills besides the theory.
For beginning what I would recommend is to study CCNA1 or Network+ and get certified as CCENT / Network+. Then, study for Security+, get certified as that. Now you should have the basis in networking and security. This is the first step.