The metaphor of life as a road or trip is, I think, common across all languages. It should not surprise you that sayings like this already exist in English:
Life is a journey, not a destination
or this excerpt from Robert Frost's famous poem "The Road Not Taken"
Two roads diverged in a wood, and I—
I took the one less traveled by,
And that has made all the difference.
In your case, you want to use this metaphor to extol the virtue of persistence. Because you're asking for what amounts to poetry, there are, of course, many ways to express this. There is no "most correct".
Whatever path you choose to follow in life, follow it to the end.
Pick your way, and see where it goes. Don't get distracted.
Or, more philosophically
Life is a journey that must be traveled no matter how bad the roads and accommodations. Don't give up.
All you need is the plan, the road map, and the courage to press on to your destination
Never let a stumble in the road be the end of the journey.
All of which would make great motivational posters, by the way.
Still, there are many similar aphorisms that offer somewhat opposite advice:
A person often meets his destiny on the road he took to avoid it.
Or, this from the great philosophers Jimmy Page and Robert Plant:
Yes there are two paths you can go by
but in the long run
there's still time to change the road you're on.
Side note: If you are interested in notable quotes on the virtue of persistence which don't use the "road" metaphor, you'll find many with an internet search. One example:
Success is not final, failure is not fatal: it is the courage to continue that counts.