Jigsaw,
When fully drawn a standard brood should be no bother - unless you want to extract honey in a radial spinner! I go with wired for 14 x 12s, and always used wired in my standards, too. I am going to try some unwired 14 x 12s this year. If extracted it will be tangential, but likely not extracted until no longer needed for brood rearing.
All foundation, wired or not, will eventually get distorted if not drawn relatively freshly, IMO. TBHs don't have too many disasters with soft frames so a framed comb should be alright, especially when completely drawn.
Stick a coloured drawing pin in the top of the topbar, or some other identification mark, so you can be more careful until you are confident handling them if you have both wired and unwired in the same box.
BTW, I would not be putting foundation into any frame until just before it is needed. It wll not improve out of the storage bag.
If you are a greenhorn at this beekeeping lark, I would recommend you start with wired and keep this unwired foundation stored away carefully (sealed in it's plastic bag) until you have a little more experience of handling frames. A mishap can be a disaster for a beginner, especially with only one colony.
Regards, RAB