I'm a newbie. I wanna make a site but don't which niche I can get more revenue?

All of them are good nut you have to promote them,buld backlinks for better SERP .For these sites will be very difficult for you.

 

Blue yonder pretty much hit all nails on the bench at once, lol.
When you start a fresh site, it will be the admin who gets it out there, and the admin who will be posting fresh content/ fresh upload/ fresh designs/ advice/ FAQs/ IT tuts whatever the niche, they will be pretty much at the centre of the big bang. And if you want to be successful a LOT of hard grafting work will have to go into it. if youre passionate/ enjoy that niche you'll give 110% 24/7. I have personally found a lot of sites, but purely the work of the admin, and himself alone. stuff he/ she has posted i found through search engines. i would never be at those sites, if it wasnt for them.

Now regarding the OP more specifically. If you choose a niche you ENJOY, and you execute is well, you well get huge amount of hits. Ive seen entertainment forums im part of have have like 700k members, with like 5k online. Its not always about what niche, but how well you execute it. i will personally join any site as long as it can keep me there. I've sometimes purely joined sites because ive respected the passion of the members/ staff/ admin. There's a hell of a lot of people out there on the internet who will be willing to go to any niche really.