Mainlining done correctly so far?

any training that fills the space and stays level is good... The time it takes to accomplish is important to consider, too. A lot of times with this method, OCD behavior predominates and it takes twice as long to accomplish the same thing. Shoot for 2-3 colas/sq ft and it really doesn't matter how you get there. This does not need to be exact.. the closest number of colas to "2-3/sq ft" resulting from symmetrical growth patterns is good enough. More efficient ways will take less time and save electricity/effort while providing same yield. Symmetrical growth patterns, stems feeding the same number of mouths are good OCD behaviors that benefit you. Bad ocd behaviors add time/effort to the grow cycle and provide little to no benefit. Just be honest about it and you'll do fine. Keepin it horizontal until you are ready to let it grow vertically will save vertical space. The good behaviours/choices don't slow anything down or add any vege time to accomplish the task.

Yeah, that looks good. Let them recover a bit before you top them. Next time you can leave 4 shoots to fill your tent better.

Very well done for the first attempt! Give the plant a couple of days to recover and keep on training and you will be amazed by the results! Keep it up 😶‍🌫️

I would have started at 45 degrees and slowly built to 90'

nice eye below

Looks like the right branch is a bit broken, where it leaves the main stem. Reduce the downwards-pressure on that one and try to get these 2 parts clean together again. You can use a plaster for this. I would reduce the pressure on the left stem too, as this might happen there when she grows on.