2 choices!
Get in and drive it, you're gonna have to sooner or later!
And as Camp Dave said, after 5 minutes, you'll find it far easier and even more natural to drive if you are right handed cos you're changing gear with your right hand!
At first, you'll find yourself using the centre road markings to judge your road postion as this is what you naturally do when driving a RHD motor, and you may veer to the centre a tad, but once you've got over that bit and use the left kerb as your line to judge your road position then it's straight forward!
Other than that, I can get one of my drivers to drive it up for you as I run a transport company and I know one of them would be more than happy to drive a '62 Rag top back from Colchester!!!
(Dazza, if you're reading, you can forget flying down there for this one fella!!!!!!)