You're already in Europe if you're in the UK. But it's easy enough to drive a right-hand drive car in mainland Europe, just take it nice and handy, and make sure to have all of the stuff that Willeke has listed in her answer.

Here's a Skyscraper thread full of driving videos from all over Europe and elsewhere:

http://www.skyscrapercity.com/showthread.php?t=653010&page=117

Doesn't look too hard.

A UK license is fine. Make sure you have your insurance and breakdown cover in place.

Remember overtaking is harder as you cannot see as easily.

Make sure you fit beam converters and remove them on your return.

You don't need an international driving permit and your ordinary insurance will cover you for driving in Europe.

Check on the requirements for what you need to carry in the car.

High viz jackets, first aid kit, spare bulbs, fire extinguisher, warning triangle.

The French introduction of carrying breathalysers has been a farce. Although you're required to carry one there is no action taken if you don't have one.

When you come off the ferry keep saying to yourself "keep to the right, keep to the right" and get people in the car to remind you.

Driving on the continent is not hard, you just have to remind yourself that you have to drive on the right.

And when driving in the Netherlands, think BIKES wherever you go, as they will be almost everywhere, mostly where they are supposed to be but like in the UK they can be where they should not be.

Get a satnav (or update your maps for the Netherlands,) so you can concentrate on the road rather than the route.

Motorways are the least confusing roads for someone who has to get used to driving on the right side of the road.

So for your first drive, try to keep to the motorways (A and E roads) as much as you can, just remembering to stay on the outer right lane till you get used to the flow of the traffic.

And some rental cars have a sticker on the screen in such a position that you hardly see it when driving where you should, but which is obvious when you are in the wrong spot. You can place a small plaster in a spot like that.

And of course, your car should be made ready for driving on the right, with the special stickers on the headlamps.

You must get driving skills in your city,

after you can come to roads ,

this way(manner) is safe.

Get an international driver's permit and be sure to pick up some EU area automotive insurance before you start driving. Also check on each countries laws. Many require a retroflective vest if you get out of your car at an accident or break down and some require a specified number of breathalyzer kits.