Affiliate Marketing Secrets

I have to services that i wish to market as stand alone services. Although they relate to fitness, they are 2 different niches. I have one website domain name that i am currently utilizing for one of the fitness services. I do not have a domain name for the other service. I plan to market all of the services via social media and email marketing. I do not have the budget to establish another website for the additional service.
How do i market both services on social media platforms effectively without combining them and confusing one with the other?
I welcome all suggestions!

I am currently a biomedical engineering major at the University of Alabama at Birmingham, and I intend on attending the Uniformed Services University in Bethesda, Maryland to become a surgeon in the military. I’ve talked to a few retired military doctors; however, most of them retired when the FST teams were first being created in the 90s. If anyone affiliated with USU or a Forward Surgical Team (preferably airborne or Navy) can give me any insight on the university or their team, it’d be greatly appreciated.

I am currently a biomedical engineering major at the University of Alabama at Birmingham, and I intend on attending the Uniformed Services University in Bethesda, Maryland to become a surgeon in the military. I’ve talked to a few retired military doctors; however, most of them retired when the FST teams were first being created in the 90s. If anyone affiliated with USU or a Forward Surgical Team (preferably airborne or Navy) can give me any insight on the university or their team, it’d be greatly appreciated.

I see sites that make great income from providing services, but dont have income from affiliate or advertisement, then I see sites that are the opposite.
Why can’t websites generate profits from all of the following at the same time :
Advertising Sales
Product or Service Sales
Affiliate Income