You don't climb a mountain by thinking about mountains then making a huge epic trek in a couple of leaps. You climb a mountain by taking one step at a time. You have to take thousands of steps to reach the top of a mountain. Not every step is going to be perfect, or even pretty. Some will go in the wrong direction and you'll need to backtrack. Some will be missteps that might hurt. But if you keep making a concerted…
I like and often use the mountain metaphor myself. Sometimes the path to the top includes some abrupt parts, akin to climbing a vertical wall. These are big efforts that requires long periods of concentration. These are often followed by easy trails with no elevation, or even downward. This can be boilerplate that you can do without even thinking. When you've reached the top, if you realize that the path you followed…
Find a local maximum that gives you some space to see around you. Climb a tree, or walk uphill for a good while - maybe a path will be more obvious from up there. In the metaphor, go spend some time learning some hobby for a while, something you enjoy doing but haven't put time into, then re-evaluate.
There is no best mountain to climb, just more mountains.
Sometimes there is no path where you want to go and you are the one who gets to blaze it. This doesn't have to be huge either, the path gets too worn down in places and new turns need to be added to get around those spots.
If you spend too much time looking at your map and compass, you won't end up putting many miles down.