Thank you everyone, you've all been superbly helpful. Barbed, I used to never be able to take criticism - (un)fortunately, my boyfriend tells me what he thinks about things I make whether I like it or not, and always offers suggestions for improvement. This caused arguments in the beginning (no one ever told me their honest opinion, I believe) but I've gotten used to it. I can take criticism better than before, and now, if my boyfriend ever does say something is good (or the lesser used word: 'amazing') then I know I've done well. But this is a great idea, and I'll be sure to build up a bit of a portfolio and ask for some critiques from among you all.
I'll also do my best to get some more practise in before trying to sell anything (I certainly won't be ready to take commissions for months, if ever, because I recognise the pressure on the crafter, and expectation of the buyer and it's a big deal), but knowing me, I'll probably try to sell regardless. I get very impatient. But I'll be certain to keep everything everyone has said in mind before pricing. You've all been superbly helpful, and I really appreciate it! ♥