Your first mistake is making an alliance character!I've played this on and off for around 12 years now (Since BC). I played it relentlessly from BC to Cata and then lost interest around Pandaland. Since then I've dipped in and out but now I've decided I want to enjoy Shadowlands. Well, what the heck is going on here then? I did the normal route as a Human through Elwynn to Duskwood and then when i hit level 30 decided to try some of the new content I missed. Headed to Tiragarde Sound in Kul Tiras and did a bunch of quests there getting to level 40 and then they dried up although I'd only completed 2 story chapters. Tried googling what I have missed and apparently I needed to speak to someone in Boralus first, but when i go there (The Harbormasters Office) nobody is there and I can't click the scouting map. I've tried googling why and I can't find a definitive answer. Some people reckon it's because i'm classed as a 'newcomer' so need to get 30 hours on this character before it will unlock certain things which seems daft and a bit unfair considering I've just paid £40 (amongst the countless sub fees I've been paying over the years) to play.
Other than that you may have missed one of the starter quests to unlock the area properly. Have a look in your quest log for any quests that might relate to it. Other than that you might have to make an in game ticket to see if they know what's wrong.
Never heard of that 30 hours thing but I've had my account since cata.