I'd say around day 10/11
She's quite stunted because I was dumb and started her in a small pot and transplanted way too early, the soil crumbled in my hand as I was doing it etc. Ah well, she wasn't really doing much but has started to, and hopefully the new lighting set up will help (more blue light). I don't plan on doing any training, just a natural grow.
EDIT 18th Jan - Adding photos of the seedling at actually 2 weeks old. It's finally starting to show some good growth, definitely relieved. The stuff on the leaves is some husks that contain predatory mites, I got them in an attempt to get rid of the thrips, fingers crossed!