In the early days of lockdown, I think the reality is that your customers (and potential customers) will be far too focused on the transition to WFH, looking after families, etc. However, this will quickly change as (a) employees’ employers start to require outputs from them or (b) self-employed people need to make money again.
My suggestion would be that you reach out to your existing customers now to see how they’re doing, and sensitively ask when their heads will be focused back on work, so that you can schedule a discussion at the right time for them.
In terms of lead generation, I think a sensitive and soft approach initially – reaching out to see how you can help potential customers – will bear more fruit than a hard sell. Right now, it just wouldn’t feel right.