To get title, game, that sort of thing you can either use the EventSub channel.update topic https://dev.twitch.tv/docs/eventsub/eventsub-subscription-types#channelupdate which will notify you of changes to a channels title or category that you could cache so when they do go live you refer to your cache.
Or you can use the Get Streams endpoint https://dev.twitch.tv/docs/api/reference#get-streams which will also contain data such as title and category if the stream is live.