Sounds like your starting your HACCP program from scratch. I think it will take 2-4 months before you get everything in order. You should start with creating some scratch sheets on your process as reference before tackling each Prerequisite bullet.
1) flow chart of your processes- Receiving-> storage-> mixing-> heat/cool-> package-> ship
Think about all of the variables involved (the prereqs will get into very specific details, but that is later)
Be familiar with every aspect of each of these, so that you can ask the right questions when looking for answers.
Write down all the products you make, where they get sold to, and any special instructions. Think outside of the box if your are stuck, ie; not like ship at room temperatures, but could it be frozen, or what temperatures should it not be shiipped / stored at.
Write down all of your incoming ingredients, and think about what could be wrong with the ingredient or could go wrong if improperly handled.
Write down how you mix, and think about how you shouldn't mix / process the product, and what could go wrong. How do you communicate the how to, and the how not to's to everyone.- write it all down.
Once you have the scratch sheets done, the next step is formalizing in a consistent manner, documents, batch number, traceability all follows...
Though it is a daunting task, its a great opportunity. Enjoy