If you're seriously making that transition, then you should learn one of the two dominant general gaming engines - Unity or Unreal. Both of them have exceptiona

If you're seriously making that transition, then you should learn one of the two dominant general gaming engines - Unity or Unreal. Both of them have exceptional documentation and can be deployed in a wide variety of platforms. If you're going from web dev to game devs as a hobby or just fun side thing, then a JS engine like Melon is a good way to dive in and start creating something people can enjoy without serious investment.