Many players are rushing to level alts as the 100% exp buff ends on 4/20. They also know every question can be answered with the huge amount of information online. Wowhead, you tube, icy veins class guides, are some good sites. That said, I like to answer questions when they ask in guild or zone chat.
The good news is there is a massive amount of group content at 120 and you can do it all with no friends or guild. I never feel alone even though I’m alone. There are queues for normal/heroic dungeons, LFR raids, warfronts, island expeditions.
There is a premade group finder to find groups for normal/heroic raids, mythic+ dungeons, heroic warfronts, world quests and bosses, zone assaults, etc. you can apply to 5 groups at a time. the BFA zones are packed on my server so when you are doing world quests there are always randoms around helping to kill mobs.