you don't want to beg for subs , subs will come naturally if you make good content and promote your videos in the right place and interact with other youtube channels and if your going into this with aspiration of making money forget it , the main things you should worry about is building the foundation of your channel which is good quality content which HD Gameplay , Good Audio Quality , Good Topics of Tutorials people want to see , subs will come if people enjoy your videos dont do sub for sub either its not worth it , just work on the main things which is the video presentation and the rest will come with time