Bu’s mission is a follow-up, starting with wool, then silk magic runes, and then forever runes
But the follow-up missions require levels. If you don’t reach the level, you won’t get it. There is no way to do it. If you want to increase the reputation of the main city, you can only do novice tasks. The Germans don't have many novice tasks at the beginning. If you finish Secret Blood and Secret Blue, you probably won't be worshiped. It will take a long time to reach worship.
Then you can only buy mounts after worshiping. It has nothing to do with 60. You can buy ponies to ride on