„ I passed the old lady's house, but the next location didn't open. And there are no new quests. What to do?“
You started in the exact walkthrough thread that shows it step by step:
You said that it is a great article, so please watch the pictures and little videos in there closely.
I deleted your post in there, as it is a duplicate of your post here and that thread was meant for info plus competition entries, not help questions.
So now here you have a place for your issue, if the walkthrough doesn’t solve it for you.
I think you missed the part about making the elixier in your foundry.
For that please read the walkthrough again, or here:
Пожалуйста, используйте https://www.deepl.com/translator или https://translate.google.com/ для перевода.