I have the freedom farms fabric bags. They cool. But water easily finds its was out the sides when watering.
Also in terms of pot size. The autos will reach a max of 1m in height (provided they are grown absolutly perfectly. Correct lights. Correct light height. Correct light schedule. Perfect nuetz feeds. Etc) as someone starting out and still learning abit. U probably dont have to stress too much on the 1m max height.
Also the bigger pots u get. The more soil u will need per grow.
Autos almost always go for alot less time then the photoperiod plants. Which means less time for roots to fill the pots.
All that said. I think a 10 liter pot would work well.
Just my opinion and experience.