A HACCP system isn't really the type of thing you can create without any knowledge at all of HACCP. They are very indepth systems that require knowledge of the exact process and equipment used and the HACCP system itself.
As you look at the HACCP post I put earlier
The first thing you have to do is make the HACCP team. This should be a crossfunctional group of employees in the business. A line operator, warehouse person, quality person, manager... like that.
You have to describe the food safety aspects of the product. Is it aseptically packaged, is it a safer or more dangerous pH level, does it have to be kept cold, does it have a high or low aW, is it ready to eat, etc.
Describe the intended use: Is it an ingredient, will it be baked, is it intended to be used by people with underdeveloped or compromised immune systems, etc.
You have to make a flow diagram of the process from receipt of ingredients to when you ship it out. The flow diagram should show all equipment the ingredients/product flows through.
Then you have to go to each spot in the flow diagram and determine what risks to food safety exist and are reasonable hazards. Hazards are typically Physical, Chemical, and Biological but some organizations include more like Radiological and I think FSMA had another one as well. For each hazard you have to perform a risk analysis on the likelihood and severity of that hazard occurring.
For each hazard that is determined to be a critical hazard you have to determine critical control points that help to remove the hazard or reduce it to an acceptable level.
For each critical control point (CCP) you have to determine critical limits based on scientific evidence (allowed size of metal or amount of biological hazard)
You have to determine a monitoring program/procedure for each CCP (who checks it, how often, a full procedure on how to check it)
You have to create corrective actions in the event that your CCP becomes out of control (if the CCP fails we do this, if the CCP is not checked on time we do this)
You have to have some way to verify the records of the CCPs. (maybe a manager checks them every day or after every shift to make sure they are done and the paperwork is filled out properly)
You have to establish documentation and record keeping for all CCPs. Forms that are filled out by operators that they checked the CCP and it was working properly.
Seriously there is a lot of stuff and you can't really properly do any of it without the proper training. People can go to jail if it's not doing right and someone dies.
Do the right thing. Tell them that it takes time to create a proper haccp plan and get the training you need to do it properly.