Hi Rolando!
First of all, your accounting policy will not follow GAAP/FASB as stated in the post above. Since you are posting from Cameroon, you would of course follow IFRS accounting which is to be used in Cameroon.
Second, there are two tasks that I see that you can attend to.
Regarding Sage, you can start to read the Sage manuals and become familiar with how Sage works.
For accounting policy, you can start by writing down the existing policies of the accounting department. Example: your company likely has a policy where fixed assets over a certain amount are capitalized and below that amount are expensed. So talk to the accounting staff to see if they can think of similar examples.
Kat