So, I am a bit confused on how the whole LSAC/LSDAS process works. I know you need to register with both in order to apply to law school. But where do you go from there? What exactly can you do with LSAC and how does each step work in getting your applications ready? Any help with be appreciated!
Good question. The process can be rather confusing, especially at the beginning.
LSAC is the master organization. LSDAS is a department/subsection/service of LSAC that deals with collecting, organizing and reporting vital applicant academic data to Law Schools students apply to with what they call your applicant law school report.
LSDAS (Law School Data Assembly Service, but now they call it the Credential Assembly Service. Why they changed the name but stuck with the same acronym to refer to it is weird

) basically is the middle man that puts your LSAT score(s), GPA, transcripts & LOR's together into one report about you that they transmit to each Law School you apply to.
You have to get certified copies of the transcripts from
ALL Undergraduate facilities you attended (even ones like if you just took one cooking class in the evenings for fun at a community college) sent to LSDAS. From those they come up with one master transcript and an adjusted GPA about you. Since different schools have different grading systems (for instance some have A+ and A-, while others do not), LSDAS converts all applicants overall GPA onto one scale so that LS admission committees can fairly compare the academic credentials of applications.
Most schools now prefer that you have your LOR's sent to LSDAS and distributed as part of your report rather than sent directly to the school. You have to check the policies of the schools you plan to apply to.
Once your LSDAS report is 'complete', including a reported LSAT score and you have submitted a complete application by the schools deadline for the cycle, it will be reviewed by the admission committee and a decision will be made.