There are 4 crags reachable from this parking lot. 3 take about 5 minutes by foot to reach while the other takes about 10. The climbing is on pretty pocketed rock and the difficulty is easy to moderate.
The easiest way would be to take the A9 to the Betzenstein exit, head through Betzenstein and Leupoldstein and continue towards Weidenhüll. Follow the signs to Leienfels, and park on the left right as you reach Leienfels. The GPS coordinates point to this parking lot.
Mountain Project's determination of some of the classic, most popular, highest rated routes for Leienfels: