Very first time !

Hello everyone, first diaries for a beginner, after a lot of reading here I am launched. I know I'm taking a risk but I was too impatient, I decided to sow outdoor three seeds of "CRITICAL" feminized Royal Queen. And after three days; miracle ! 😉here are three pretty little shoots. I hope that the heat wave we suffer in Belgium will help me to mature these three young ladies. So please, do not hesitate all your advice is welcome, and I am listening to positive reviews. I am not new to gardening; but so far I was limited to salads and tomatoes :-), thank you in advance to all. Oh yes I was going to forget, I'm going for the indoor; but i would like to use led, can you give me a hint, there are so many brands / models?