New to photo and video Sony a6400

[Travelvideoguy]

So I decided to buy the 6400 over the a7iii because of price I put in an order for 4 lenses the 18-105 oss 4 and the sigma trio 16 30 and 56. I also got a robin sc gimbal pro. I want to make cinematic videos you see on YouTube I also have the mavic air 2 drone. Will this be enough for great quality? Do I really need all 4 lenses I know little about photography just basics I’d love to catch the Milky Way and northern lights so 1.4 is great but do I need the sigma trio? All three? Plus the 18 105 Sony Is it over kill for what I want to do?? Should I kick a lense or two off my order also I will probably do a little vlogging so the 16 is good there. Spent over 3000 bucks on camera stuff plus 1000 for drone. Maybe I should just get a a7iii used for 1400 bucks and a 2000 dollar lense idk??? Recommendations?? I travel everywhere in the USA and can make killer cinematic videos of nature and cities.

[mirrorlessNY(youtuber)]

I think A7III paired with Tamron 28-200mm would be a great all-in-one travel camera setup.