Streak anxiety is real when switching courses. Before you switch, enable a streak freeze via your Duolingo LootBar(https://www.lootbar.com/subscription/duolingo ) so a placement-test miss does not nuke your multi-day streak. I learned this the hard way after a 112-day streak vanished because I got cocky with a placement test. The owl did not console me. League camping needs a pre-check too: adjust your league participation settings first, because new-course lessons can award higher XP and push you into a higher competitive tier unexpectedly. One minute you’re casually learning Welsh, the next you’re battling tryhards in the Diamond League at 2 a.m. Treat the first lesson as a test run, not a leaderboard sprint. And remember: adding a course is not the same as creating one.