Tips and cautions with my first setup in the mail?

After a lot of reading and fence sitting, I finally decided to start a small grow. I wanted to post it here and ask for folks who are more experienced to point out any potential snags or obsacles I might hit with my choices. Maybe something obvious stands out to you that I can't see.

For noob friendliness, I went with a well-review blurple LED that can at least get me from start to finish with one light. I know my seeds like slightly muted lighting, and I have an LED strip that will contribute maybe 50W, so that's why I thought it made sense to buy the 450W over 600. Here's the full list:

Tent: Vivosun 30"x18"x36"
Fan & Filter: 4", 190 CFM
Light: Viparspectra 450W LED

Medium: Fox Farms 70% Coco+Perlite
Nutrients: Dyna Gro Grow + Bloom

I'm open to all feedback, but had one thing in mind: If my goal is to cover the basics, do I need any more nutrients besides Dyna Gro Grow + Bloom? I've read CalMag is important, but what if I include some doses of hard water as part of my feed?

Thanks

I’ve had success with some cheaper less but just know that the light your using isn’t a true 450w led that’s the watt equivalent. If it was like mine which I believe it is, it’s more likely to be around 120w-150w actually drawn from the outlet.