I have made plenty of mistakes, but my grow bags have worked out really well.

I used similar bags over a year ago when I grew a pair of plants outdoors, and I remember thinking that there is just nothing better than these awesome bags.

The plants never have problems with the roots with these bags, since the fabric allows enough light that the roots stop trying to push out, and are “burned off,” once they touch the wall of the bag (roots are photophobic).
You can actually get a decent price on Amazon as I write this, but of course, shop around.

Vivosun 5-Pack 5 Gallons Grow Bags