Certainly! That sounds awesome...I hope you make a journal and I'll follow along. Otherwise feel free to ask me anything you want. Here to learn and share what I know!
If I eventually go with the 12-12 from seed, I am rethinking my entire "Soil" options, I am thinking the soil mixture I mentioned might be a huge risk for 12-12, since I don't have a veg stage, using the 18-6 will give me time to fix any issues and expand my veg period till I get it all right, but with the 12-12 I think I don't have that flexibility and I should have everything right from the get go.
On the other hand if I want to go with a grow medium other than the soil I mentioned I am limited with one option only and that is basic coco coir with a PH range from 6.5-7.5 and perlite. Fertilisers won't be an issue as I have a wide range of fertilisers available; they are definitely not specialised for cannabis; but I can adjust concentrates and PH easily, I am not worried much about that.
advice needed:
1) 12-12 with soil mixture and see how it goes
2) 12-12 with basic plain coco and perlite
3) Normal veg them flowering with soil mixture