Your gonn need more than 11L pots bro.. Thats only 3 gallons.. I would go with 4 or 5gallon just to be safe.. As for yeild If you grow the to about 1.5'.. And you flower them and everything goes well, as in there's proper ventilation, temperatures are good, and there getting proper nutrients and everything else they need.. Then 2-4 ounces a plant is a likely yeild.. Thats with everything going well.. Which is hard to get on your first run.. Since its your first time just grow the plants and be happy with what you get, just treat it like a learning expierence..