Learn Finnish: Minuakin kiinnostaa historia.

The ending -kin attaches directly to the word you want to emphasize. Because it is attached to minua (me), the sentence means 'History interests me too' (along with someone else). If it were attached to historia instead, it would mean 'History too interests me' (along with other subjects).

Why is the pronoun for 'me' in the partitive case (minua) instead of just minä?

The verb kiinnostaa (to interest) requires the person who is feeling the interest to be in the partitive case. In Finnish grammar, history is the subject doing the action of 'interesting', and you are the one receiving that action.

Why is the word order flipped to 'Minuakin kiinnostaa historia' instead of starting with history?

Finnish word order is flexible and is often used to show emphasis. The word with the -kin clitic is usually moved to the front of the sentence to highlight it. You could technically say 'Historia kiinnostaa minuakin', but putting minuakin first strongly emphasizes that you are also included in the group of interested people.