As much as I like @carlosescobar idea of using orchid pots, I prefer using the sleeved solo method for checking root development. Roots don't like light. Growing them in the orchid pots will expose the roots to light.
The sleeved solo method, for those that don't know, is to plant your seed/cutting in a clear solo cup and use a colored solo as a sleeve to shield the roots from light. Whenever I want to see how my root development is going I just slip the clear solo out of the colored one and I have a full view of the root system without affecting the roots light sensitivity.
I agree with @Blastfact. Your autos are done. Give them their last rites and toss 'em!
Before you make another attempt, I would caution you to not use autos as a newb and start with either regular or feminized photoperiod seeds. As has been mentioned, auto seeds are genetically modified to follow a time schedule rather than light duration so if you screw up, your time and energy have been wasted. I believe auto seeds are best left to more experienced growers that can identify and treat issues that may crop up and address them quickly before they get out of hand.
Photoperiod seeds allow you to grow them as large or small as you want and you get to decide when they flower. This allows newbs to make mistakes and learn to identify and fix those issues. Regular photoperiod seeds will make you have to cull male and female plants so you may or may not get the amount of female plants you want hence why many reg seed growers plant lots of seeds and cull accordingly. Feminized seeds will guarantee, for the most part, that you will have as many females as seeds you planted.
If you want to try again with your auto seeds consider growing them near a sunny window. I've been mentoring another newb on another site and he got brave enough to plant an auto seed he had in a 3 gal pot and just placed it next to a window that gets a lot of sun. All he did was water until he started seeing preflower pistils then he started feeding it a nute recipe I setup for him. He was trying to use Alaska Morbloom and Fish nutes that he bought at his local hardware store. I worked out a mix with the two and he's been very successful with his auto grows. I liken it to a greenhouse grow since, indoors, the temp and humidity were good enough for the plant to respond well and the sun coming through the windows provided the light energy.
Whatever you do, Good Luck!