Export from LUTly, install, apply. Three steps and one setting that matters.
Export your .cube files from LUTly.
Project Settings > Color Management > Open LUT Folder. Copy the .cube files in.
On the Color page, open the LUTs browser, right-click and Refresh. Drag your LUT onto a node.
LUTly LUTs include the log conversion. If your project uses colour management or an input colour space that converts log automatically, bypass it for these clips. Two conversions make the grade look wrong.
Resolve's colour management is converting the log footage before your LUT. Bypass the input colour space for these clips; the LUT contains the conversion.
A node on the Color page gives you control; right-clicking a clip thumbnail works too.
Yes.