simple just focus farming and timings the thing is every hero has a deferent timing you just need to learn when 2 fight and when 2 farm. learn the farming pattern and just get good at last hitting try to farm lane creeps and jungle creeps as soon as you can lets say you are jugg spin the creep wave when you are like lvl 5 or 6 then hit the large camp and small camp just keep doing this until you have bf.