Hi,
like you I am also on my first grow and using Viparspectra lights. In my opinion your plants look great. Only 1 month in and you have 5+ nodes so they are probably about to explode even more - don’t worry. By the way... how much fun are you having growing?? That’s the main thing!
I am using 2x300w in a 2x4 with 5 plants. I certainly could have used more light too, but I vegged mine too long and even tying them down they were too tall for my 5” height so they are being light stressed. Not helping. Despite that, mine are on week 5 of flower and seem pretty good from what I can see. I’m just hoping the buds get a little more dense over the next couple weeks.
Good luck and keep it up.