If you are clear to what you want to achieve from your brief encounter with a visitor, you can encourage them to take the next step.
The important thing is to not move too quickly or to expect such a big commitment – it makes people smell a rat – even if there isn’t a dead rat in site! It’s the equivalent of meeting for a coffee. Keep your expectations sensible, if your next step is to get people to download some material or make an appointment – that is probably a good outcome. Make sure that your website alludes to this – work with your developer by clearly outlining what the process should be and they can advise how best this can be achieved.