When your first disbursement goes to the school, your loan is on-boarded at either SoFi or MOHELA, meaning you can see the loan information in your sofi.mohela.com or sofi.com portal about 2 weeks after the first disbursement.
You are able to make early payments between disbursements in your sofi.mohela.com portal if your loan is serviced by MOHELA, or your sofi.com portal if your loan is serviced by SoFi. However, your first payment is not due or billed until the loan is fully disbursed. So the Final Disclosure may show a "deferment" period between the first and last disbursements, even for loans that go into immediate repayment while in school.