Dave,

If it's your first time, you're pushing it a bit -> across & back again the same day. What would be the point? You'd just be tired/wet.

Take it easy - look for a good forecast. In your case a steady 3Bft would be ideal - you will want steady wind, it's no fun motoring all the way.

Next - where do you want to cross? If not being able to sight land, go for a Dover/Ramsgate to Calais/Bologne trip.

It's just like crossing the road really - may look daunting, but with plenty of common sense there's nothing to it.

Fair winds.
If not... reef early!