Yes, it's worth making mincemeat (and the Christmas pudding). I do both, using Delia's recipes, and also make a Christmas cake. I steam the pudding in my ancient slow cooker, which is really easy, as it needs no attention at all while cooking, and reheat it there too on Christmas Day, which saves a ring on the hob. The mincemeat is extremely straightforward to make. Both mincemeat and pudding take a bit of work assembling the ingredients, doing a little bit of chopping/zesting, weighing them, mixing, but that's about as hard as it gets. Both taste so much better than ready-made!
The cake is the trickiest technically, but it's not that hard really, you just need to be systematic, make sure you've put in all the ingredients and take care with the lining of the tin, not baking at too high a temperature, letting it cool in the tin before you try to take it out, storing it carefully (wrapped in parchment in a tin or tub with a well-fitting lid).
I don't care for icing and can take or leave marzipan so I make this recipe: www.bbc.co.uk/radio4/womanshour/food/recipe46.shtml
I don't make mini cakes and I don't bother separating the eggs. It's incredibly moist and rummy. We don't usually get round to it until the New Year but it really helps with the post-Christmas anti-climax!