If you find yourself questioning something that feels inappropriate or abusive, then it probably is. Do not "use" an interracial couple in a shoot just to make your portfolio more diverse so you can start seeming more inclusive to the industry. Start first with yourself. Take a step back, and look at the inner circle of people you see every month. Who are they? What do you all talk about? Are you discussing issues related to populations you have no experience with? Do you participate in tokenizing? Overall, if you share these values and want to start out in the industry, double and then triple-check yourself and your own life. Because if you're still participating in social practices that are damaging or harmful toward marginalized groups in this country, whether it be consciously or subconsciously, then frankly you haven't done the work.