My father learned me how to ride a bike.
My father taught me how to ride a bike.
I learned how to ride a bike from my father.
Use learn when you receive knowledge or develop a skill: ‘I learned how to ride a bike.’ ‘She is learning English.’
Use teach when you give someone knowledge or help them develop a skill: ‘My father taught me how to ride a bike.’
We can use learn + noun, learn to + infinitive or learn how to + infinitive: ‘learn English’, ‘learn to drive’, ‘learn how to swim’.
Do not use learn someone when you mean that you teach that person.
Both learned and learnt are correct past forms of learn.
See TEACH