hello. the pronunciation is very similar, that is true.

but the meaning is different.

" I learn to" is in the present.

" I learned to" is in the past.

to make it clear which one you are speaking, you just need to speak " learned" a little more slowly and make sure the d at the end is pronounced. the letter e at the end of learned... learn(e)d is not normally pronounced. so the word sounds like "lernd"

hope this helps

matt