Once the seedlings are toddlers, try not to mother them to death. Don't overdo the nutes. Water thoroughly, then let the pot get light before watering again. The less you fuss with them, the better they do. I know, I know, hard to leave those beautiful living things alone!
If you plan on applying any training to them, just tie them down while young to keep the future canopy even. You're looking for low and wide, so they don't hit the lights when they are mature. But you need to start the training when they are 4 nodes high, while they are still flexible.
There are lots of tutorials for different types of training on this site. LST is a good place to start.
I just realized that you have experience growing. So go with what works for you.