As for selecting a larch, I hear what you say, that it might not be a good idea to start with that, but I wouldn't be starting with it. I would be starting with whatever i choose from the nursery, and in the two or three years it takes to grow into something ready to shape I assume I'd have enough experience to handle it.
If you think that would still be too early, please say so, I will reconsider and pick up a juniper instead.
Other than practically all people new to bonsai on this forum, you are aware that it takes time to grow something first, before you can shape it. So, yeah, why not get that larch too. You don't have to start training it rightaway and you can grow it into better material for the future.
Do you have any objection to my picking up a small maple to bring up as bonsai?
Why would I? I only like to point out that there are countless varieties, some are more suitable then others. I would not select a 'dissectum' variety. I'd also avoid grafted species (most varieties are grafted). A good choice for a beginner could be an Acer Palmatum Kiyohime, a dwarf variety. Here's some good info about maple varieties for bonsai:
bonsai4me.com/SpeciesGuide/AcerPalmatumAdvancedGuide.htm
I'm assuming you meant Japanese maples, but there are other maples that are suitable too, like Acer Campestre.