I definitely recommend making your own pastry, the results are almost certainly going to be much better than any shop bought stuff and shortcrust is actually very easy to make, especially with a bit of practice. Puff pastry is more difficult and that's why you can find it for sale in shops.

Once you've learnt how to make shortcrust, then many kinds of other pastry will look simple, e.g. delightful almond pastry.