The biggest mistake that most founders do is they don't do enough outreach because they don't work backwards from the goal. Outsourcing sales is wrong. You should do it yourself and you need to qualify customers during your first call. Here are some of the tools I recommend: Apollo close.io, pipe drive or hunter.io.
How do you get your first customers? YC Group Partner & former Head of Growth at Airbnb, Gustaf Alströmer, gives tactical advice to answer this question for all kinds of companies — whether you're B2B or B2C — and discusses why it's important for founders to do sales early on.
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