There are still many twists and turns. What do you mean?

The road ahead is still long, full of twists and turns and difficulties. There is still a long way to go. Generally speaking, there is still a long way to go in life. Tortuous refers to bending, or (the development of things, the story) is complicated and changeable. There are still many twists and turns, which means that there are still many unknown challenges and difficulties to face in life, and we need to be fully prepared to deal with them.