Greetings, fellow learners and aspiring SAP professionals!
@rrayosdelsol you can take a look at SAP Learning page (https://learning.sap.com/ ) and before to search an specif certification could go to the student zone (https://learning.sap.com/student-zone ). It gives you an overview about SAP and the diferent roles that you can choose.
After that, you could go to Get Certified --> All Certification (https://learning.sap.com/certification?page=1 ) .
If you chosee one, you can find an overview, number of questions included, how long does the exam take, cut score, a link to sample questions, how to prepare section, topic, and more.