lenken
to steer
To determine and control the direction of a vehicle (e.g., car, bicycle) with a steering wheel or handlebars.
Er lernte schon mit 16, ein Auto sicher zu lenken.
He learned to steer a car safely when he was just 16.

to steer / guide
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to steer
To determine and control the direction of a vehicle (e.g., car, bicycle) with a steering wheel or handlebars.
Er lernte schon mit 16, ein Auto sicher zu lenken.
He learned to steer a car safely when he was just 16.

You can recognize the meaning of 'lenken' (to steer/direct) from the object. If it is about a vehicle (car, bicycle), the literal meaning is intended. With abstract nouns (attention, conversation), the verb is used figuratively.
Der Fahrer konnte den Bus nicht mehr lenken.
The driver could no longer steer the bus.
In the figurative meaning, 'lenken' (to direct) is often used with the preposition 'auf' and the accusative. The structure is: [etwas] auf [jemanden/etwas] lenken ([to direct something] toward [someone/something]).
Er lenkte den Verdacht geschickt auf seinen Kollegen.
He skillfully directed suspicion toward his colleague.
When it is about leading an organization or a country, 'lenken' (to lead/guide) is often combined with words like 'die Geschicke' (the fortunes/fate), 'das Schicksal' (fate), or 'ein Unternehmen' (a company).
Die neue Geschäftsführerin soll die Firma aus der Krise lenken.
The new managing director is supposed to steer the company out of the crisis.
to drive / ride
'fahren' and 'lenken' can both mean that someone controls a vehicle. But 'fahren' is more general: you travel by vehicle or operate it yourself. 'lenken' means more specifically that you determine the direction, for example with a steering wheel or handlebars. Learners may confuse the words because when you drive a car, you also steer. It is natural to say: 'Ich fahre Auto.' (I drive a car.) When the focus is especially on the direction or steering into a curve, 'lenken' fits better.

In der engen Straße musste Max das Auto sehr vorsichtig lenken.
On the narrow street, Max had to steer the car very carefully.
Seit dem Sommer fährt Lena jeden Tag mit dem Fahrrad zur Arbeit.
Since the summer, Lena has been riding her bike to work every day.