The Problem with building to 1.8 Ohms is you are either going to need a Very Thin Wire (like 32ga), or a Lot of Wraps (like 10 Plus).
32ga Wire is pretty Flimsy to work with. And a Coil with 10+ Wraps sometimes can be a Tight Fit by the time you get Cotton in it.
Here is a site where you can Play Around with different Scenarios and see what might work...
Coil wrapping | Steam Engine | free vaping calculators
I'm a Believer in Don't Try to match the Coil/Ohms to a Wattage. Do it the other way around. Match the Wattage to whatever Coil you Build.
If all this is New to you, I think a Good Place to start is to do 3mm Diameter Coils with 6 or 7 Wraps. Using 26ga or 28ga Wire. And just let the Ohms fall where they do. Then Adjust the Wattage to what Hits the Best.