You will set your personal project goal based upon something you find interesting. You could draw from your past experiences in the MYP, for example:
For Criteria Ai) you should state a learning goal. The learning goal should outline the skills, competencies and/or knowledge that you will need to be able to create your product goal. You should also explain the connection between your personal interests and this learning goal.
The figure below gives an example.
(Figure 7, An example of starting with a learning goal to guide the creation of the product, IBO, 2021, p. 25)