Need Some Guidance On My Grow

So recently I received some seed in the mail that I ordered from msnl seed bank (I got the outdoor mix)10 pack & they had a germination rate of %100 using the burpee 72 cell
Self-Watering Greenhouse Kit.
& one of my concerns is if the seeds are mean for outdoors can I still grow them indoor?
2nd question is
Will I need to purchase a higher wattage light ?
I’m currently using a 20 watt full spectrum led
3rd question
I’ve Grown before but never got past the 4th node
& my plants are always super leggy.
Will a fan thicken them up ?
Last questions
What signs do I look for on my plants when they are ready to be transplanted ?
I have these nutrients , when should I use them ?
By the way this is the soil I plan on using when I transplant.

Yes light breeze, maybe lower the light, after a few leaves come in put them in a solo cup. All plants are meant to grow outside but that’s why we made indoor tents so we can mimicking it

It doesn’t matter how much you lower the light 20 watts is 20 watts which is not even close enough to grow a plant under so yes you’re gonna need to buy some light to put it under