Czech Nymphing is no different than tight-line nymphing. Many folk broke into fly fishing through bait fishing. Think about drifting a worm or salmon egg with a split-shot through a seam, tapping that split-shot along the bottom, with only your leader in the water and rod held high. It doesn't have to be drag free......just get your bait through likely water. Drag it, bounce it, swing it. No different than Czech Nymphing. If you've ever high-sticked bait with a fly rod....you're there....just replace the bait and split-shot with a heavy fly or set of flies.