Personally, I suggest you use the second method.
Ask your own questions first, and after the respondents who are interested in or good at this field answer, choose the respondents who are more suitable for your questions, spend less money, and more importantly, take fewer detours, which is more efficient and effective.
As for who to turn to for your question, it mainly depends on your own choice, and the key is related to the content you ask.
I hope I can help you!