Some tracks I came up with
The Sissach-Liestal Circuit, clockwise with start/finish at Sissach. Easy and straightforward, but the Eastern hilly section and the corners in Liestal keep it interesting.

The Lenzburg Street Circuit, anti-clockwise with start/finish around Lenzburg Trader. Fun circuit with a good number of corners.

The 'Nordschring', streched across the streets of Luzern, Wolhusen, and Emmen. Anti-clockwise with start/finish at Wolhusen. Not much room for mistakes here since you're bound to hit something if you go off.

The Rorenpass Hillclimb, starting near the coast at Goldwill and ending in the town of Sorenberg. Challenging mix of bumpy coastal roads, fast straights, hairpin bends, cliffs and drops, and many opportunities to get some air. Mistakes can be fatal.
All the courses here are road courses, no dirt tracks for now.