I don't think that explosions are much of a problem unless you forget to store the 'juice' without some kind of a fermentation trap. The main problem with DIY cider is extracting the juice. Generally, you need to crush the apples and then put them in a press to extract the juice.
You can crush the apples in a food blender, (takes ages), with a length of untreated 4×4 or similar, or with something cobbled together from a big hammer drill and a pug mixer.
To press the apples you can either make your own cider press….
http://www.ukcider.co.uk/wiki/index.php/Homemade_Cider_Press
or rent one from a charity, that's what we did……
http://www.orchardlink.org.uk/
If you've only got a small quantity of apples then you could probably just put them through a fruit juicer.
If you're going to all the trouble mentioned above to make cider then it is worth adding sugar if necessary to bring the specific gravity up to a reasonable level. That way you'll get a strong cider with a decent flavour, that'll probably taste better sooner!
Plenty of info on making scrumpy on the net.
I've still got several gallons of last years pressing maturing in the cellar. In fact, I might just crack open a cask this evening to help me cope with this atrocious MTB unfriendly weather 🙂