Warren Buffet, at his office with coworkers, once they came to him with bag of papers on potential investments. He quickly run through all of the papers, turned to them and said no.
People in a slight shock :
,, - But Warren, those are great companies''
,, I know, i know...But come back to me, once they have first earnings''.
When you start showing fruits (profits), birds will fly to you themselves.
Im not sure if going for the big accounts right away, is a good approach. More likely - unlikely to come into reality. Better let it grow, start small.
When i took some money from my mom, and brought her back some profits, it became way much easier to persuade her, to give me 1/3 of her life savings. My grandma joined as well. Sisters family about to come into the party. Then other close relatives will follow, meanwhile, some friends are ,,waiting in the line''.
And one day... Then, most likely, you will get those doctors and lawyers.
But it's only my perspective, maybe you will travel straight to that point.
All the best tho.