Want to start a gaming youtube channel. How to get subs and how to start in general?

Don't suck.

You need good equipment such as a good quality microphone, a capture card to capture your gameplay is high quality, and a good computer to edit. The best way to approach a gaming YouTube channel is to play what you enjoy, don't "do it because they got lots of view on it" or "because someone told me to", do it because you genuinely enjoy it, the more enjoyment you're having the more likely it is you will slowly gain a fanbase and subscribers.

I been YouTubing for 1 year 7 months now and loved every last bit of it! I started growing more when i invested in good equipment and spent time making my channel look good. As long as you enjoy it your viewers will too. Don't lets numbers concern you, someone with 100 subs could be equal to someone with 100k subs, it just depends how they brand their channel and share it around because it is very hard to grow a channel.