I'm looking to go for the Certified CISO certification & training as I'm an aspiring CISO. Any recommendations and additional certifications that I should be doing along with that? I already have CISSP. 

YouTube is an excellent source for learning resources. So, before you take the exams, which can be really challenging, be sure to get that extra knowledge.

First, you need to get your certifications up to speed. Start with the basics and move to the advanced level. Do one a month for the rest of 2025 and you will lay a solid foundation for your cyber security career path. CISSP, CISM, CISA, CCSP, CRISC, etc.
Second, go to LinkedIn and do a search for CISO jobs. Look at the requirements that are listed by companies that are hiring a CISO. The criteria may include, experience, certifications, the correct degree, etc. While in reality, you do not need all of these items to run a team, you will need these items to get the interview!
Example from a LinkedIn CISO job posting:
Qualifications:
Education: Bachelor’s degree in Computer Science, Information Technology, Cybersecurity, or a related field (Master’s degree or relevant certifications preferred).
Experience: 10+ years of experience in information security or IT, with at least 5 years in a leadership role overseeing cybersecurity programs.
Certifications: Preferred certifications include CISSP (Certified Information Systems Security Professional), CISM (Certified Information Security Manager), CISA (Certified Information Systems Auditor), or equivalent.
Technical Skills: Deep understanding of cybersecurity frameworks, threat landscapes, encryption, network security, cloud security, and endpoint protection.
Leadership Skills: Proven ability to lead cross-functional teams, manage budgets, and drive strategic initiatives.
Communication: Exceptional verbal and written communication skills, with the ability to explain complex security concepts to non-technical stakeholders.
Problem-Solving: Strong analytical skills with a proactive approach to identifying and resolving security challenges.
Regulatory Knowledge: Familiarity with industry-specific compliance requirements and data protection regulations.

Great question!

I am also curious to hear recommendations from others who have pursued these paths. I am exploring ways to complement leadership focused certifications with emerging areas like AI and PQC myself, so any insights would be helpful

I might suggest looking at https://theciso.org/ and joining that network

CMU's CISO Executive Certification Program is very good, with excellent faculty, a global community, and real-world practical use cases.