Yet Another Bag Seed Grow

First attempt at growing, with a very tight budget. 1sqft and 42w Soft White CFL's (2x). Used Miracle Grow Seed Starting w/P for first soil.

I definitely need to build some sort of reflector for my lights and get 2 more Daylight Bulbs. Places to get Mylar and is it expensive? Roots are pushing against the container, they need to be transplanted, would a move to a 3gal pot be to early? If so, what size is recommended at this stage? For repetition's sake, start nutes 2 weeks in?

Picture Key:
1. The Setup
2. 24 Hours after planting
3&4. Day 7

try to find something in the neighborhood of 1 gallon for now. anything bigger would be a poor use of resources. don't start nutes till the first leaves start to yellow.