If you are new to certification. And started reading or already got ITIL Foundation Level Certification, then go for Intermediate Levels, and try to be Master in your field which you want to make career in ITIL Certification.
There are Many ATOs available to consider attending their training and getting the help to get certified.
Consider Sprintzeal since they are an ATO for AXELOS and PEOPLECERT.
https://www.sprintzeal.com/course/itil-v4-foundation-certification-training