Sounds like you would call the mod “Classic ARK” 
I’ve no idea how hard this will be, but I can guess. I’ve wrote a few mods for Minecraft, but I’m just trying to learn a bit about ARK modding at this point. So far all I’ve found out is that I probably need 16 GB more RAM.
I’ve used a lot of mods. So for what you want, you need to change a lot about the game. One mod that does part of what you want is Classic Flyers. I think if you asked that author, you would find that he spent a lot of time working on his mod. Now you would probably have to multiply his effort by 10 to get what you want.
If you are willing to install a few mods that do part of what you want, you can do some of the rest by reading up on how to remove spawns of some of the dinos that you’d like gone. The wiki and a few google searches should help you figure out how to do that part. ARK has a lot of configuration options, I know that much from the little bit of admin work that I’ve done. I don’t know how to do this myself, but from what I’ve read, it is possible to remove some items from the game.