44ad or 44ada - which one is applicable to my business ?

Hello everyone !

I run a small proprietary business. My business provides software/website development and data entry job for foreign clients.

I am a non-technical person (B.A. degree). I have employed programmers and data entry operators / SEO. 

Can anyone please tell me if my business falls under section 44AD or 44ADA ?

Also,

Right now I'm getting the money from client's bank as INR. As all my clients are foreign client (service provided outside of India) they will not pay Indian GST. If I'm correct, I need to get payment as USD in my bank to get exemption from GST.

How do I get payment as USD in my bank account ?

Thanks.