I am with 18greens.
Been there many times, it's never been an issue joining from any direction. Don't overthink it but plan ahead and know what to expect.
Just try not to go through stapleford' zone (unless you want a really nice baguette sandwich of course - but I'd talk to someone first), and keep below controlled airspace.
I normally fly around 1200/1300 ish just so that if I hit a particularly strong thermal / transponder is not always as accurate as one would like it to be, Just so that I don't pop up on the standsted screens.
Joins vary depending on runway in use / winds. Might even get a straight in!! Downwind is most common though. Check the airfield plate too - loads of useful information!
They're really nice at North Weald, just bear in mind that they'll ask you which side of the field you want to go to when you land, a map is available in the AIP (and useful). I quite like the flying club's cafe.
I hope this helps!