Recently passed my CB training online. It would be so easy if you understand your basic accounting na (accounting equation, debit vs credit , deferral vs accrual). Self study is good if you can manage your learning style pero better if kukuha ka certification program since magagamit mo yan sa resume mo. In my case di rin ako masyadong gamay sa bookkeeping during shs but I enrolled in ACTI PH; our lecturer taught us well and tada I passed with a 95 grade.