Hi @imsaif, I am not sure if the brief or requirements would be too difficult but if you could share briefly about the nature of the work without disclosing confidential information that would allow us to help you.
If this helps I'd be happy to share a little about the work my team did. A lot of the features our design and experience developed requires a balance when it comes to meeting business and design requirements. From a business point of view the set of features (Though not all) developed should create value for paid customers and at the same time help resolve our users' problems, or unmet needs. Whereas in design we take it as a tool or a leverage (Visual consistency, typeface and proper use of colour for interaction elements) to elevate the product, from a macro to micro level, of course in the context of design there can be more.
May I suggest you to start off slow by identifying the key problems from the brief. These can be issues experienced by customers, feature usability issues and etc so you can have a kick start point. From then conduct a simple research on how other competitors are doing, how they approach these issues.