Below mentioned are the sources which I read on creatine .
But I’m not a doctor and I’m not sure about you.
But I hope this helps you .

International Society of Sports Nutrition (ISSN) – Position Stand on Creatine
https://link.springer.com/article/10.1186/s12970-017-0173-z
Creatine Supplementation and Kidney Function (Systematic Review – PubMed Central)
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12590749/
Mayo Clinic – Creatine: Safety and Side Effects
https://www.mayoclinic.org/drugs-supplements-creatine/art-20347591
Nutrients (MDPI) – Safety and Bioavailability of Creatine Monohydrate (Review)
https://www.mdpi.com/2072-6643/14/5/1035
Journal of the International Society of Sports Nutrition – Creatine Research
https://jissn.biomedcentral.com/
PubMed – Creatine and Muscle Hydration / Energy Metabolism
https://pubmed.ncbi.nlm.nih.gov/?term=creatine+muscle+hydration
PubMed – Interpretation of Creatinine in Kidney Function Testing
https://pubmed.ncbi.nlm.nih.gov/21248115/