Some of tips I would say are:
-Decent mic
-Clear voice
-Be original
-Be yourself
-Upload daily
-Have a variety of game modes
-Good quality (I would say at least 480p, 720p is preferred by most)
-Find cool ways to attract new viewers/subscribers
And what I find the most annoying about new youtubers....
Don't ever never trever lever kever....
Advertise on other people's videos
Good luck with your channel