Glad I could help.
A good starting mix and the one generally used is a 1/3 oil, 1/3 varnish 1/3 thinner.
However, by varying the ratio's you can vary the properties of the finish. More thinner means better penetration but more coats to reach a nice luster, also a faster cure, more varnish means more protection, more oil means a faster build to a nice luster but slower cure time, etc.
Don't be afraid to play with the ratio's, there isn't any right one. Feel free to vary and experiment and find one you like.
Just remember a Danish oil finish is not one that is meant to build, it is an oil finish meant to give the close to the wood, feel the grain, finish that provides just a little more protection then straight oil. It is applied the same way as any oil finish is. Wipe on, even flood the surface, let sit, wipe off excess, let cure, repeat as necessary
Add enough coats of the stuff and you will eventually get a build and a surface finish of sorts but it is the long way around the mulberry bush and, with the high oil content, the end product will be relatively soft and low on the protection scale.
Good luck