For testing purpose & hoping it's a girl

Hi, I'm Cino from Western Europe. Last year, I found a seed (in the last weed I bought before growing it myself) and kept it in my tiny bank of seeds. It was sold as Northern Lights but didn't look/taste like it. There is no way I can be sure of the strain nor even if it's feminized. I'm starting this grow for fun, trying and learning purpose only... 🙏🙏🙏 hoping I'll be rewarded with a decent harvest. I've only tried one exterior photoperiodic grow without any training technic and I want to give a try to HST, learn to take cuttings and get clones, set up a little SOG, etc. before using overpriced seeds. I'll grow an autoflowering Original Afghan Kush from FB alongside with it in order to make this grow more profitable : 18h day / 6h night for both of them, so the unknown photoperiodic should vegetate for months before I let it flowering (and know if it's a girl) when OAK will be done. I know I could take a cutting under 12h light cycle to verify in a few weeks but I don't want to... let's gamble! 😅