Work backwards through your actual conversion math: start with the revenue number, divide by average deal size to get customers needed, divide by your close rate to get qualified leads needed, then divide by your lead-to-visitor conversion rate to get the traffic or outreach volume required. Each step should use your own historical numbers, not industry benchmarks, since close rates and conversion rates vary enormously by business model and price point.
If the resulting traffic or outreach number looks implausible for your channels and budget, that's the plan telling you the goal or the timeline needs to change — better to find that out on paper than three months into execution.