I'm not worried about Dak at all, and the best thing for him to do would just ignore the mostly ridiculous fan base. Whether it's the base criticizing him for "lack of a deep ball", where excluding his first game as a pro, he's almost leading the league in YPA, or the base that thinks Tony should take a backseat. Equally ridiculous.
Dak has one of the best rookie campaigns in recent history. What he's accomplishing is just unbelievable. Some people don't want to acknowledge it, maybe because they don't want to jinx us, but it's a fact.
Some of it is because he was brought into a great situation, most of it is because he's just that good. He still has a long way to go, mainly in pre snap reads, because that just takes time, but people who are expecting this "crash to earth" are in for a surprise.
It's likely to expect some kind of epic failure if you didn't really know how bad his college team was playing in the SEC. He got killed in college, Alabama sacked him 6 times, he had marginal talent to work with, and he still went out there and put up some incredible numbers comparatively given the talent. With his rushing and passing numbers, you know the guy is a lot more intelligent than people think, and also a lot tougher.
He also set or nearly set an SEC record for attempts without an interception. On that team.
The SF game epitomizes him. His first game at Candlestick, backup LT playing, no Dez, a quick 14-0 hole, and he comes out and helps lead the team to victory throwing for a 115 rating, 0 ints, and nearly 8 yards per attempt. I don't know if he's even capable of feeling stress.
The best thing we could do is simply let him play, let him mess up, and guide him through the process. For 90% of rookie QBs id say the best practice is to let them sit a year or two, groom them, but that's because they usually aren't very good when they enter the pro spectrum. It's a different game. But Dak has shown he can not only play, but he can play at a very high level. Any fan that's watched rookie QBs the last decade, high picks, forced to start, knows that Dak has "it". Poise, whatever you want to call it, it's not normal.
If you really want to hedge your emotions, then sure, expect this drastic fall. But don't be surprised when there isn't one.