อยากเก่งภาษาควรเริ่มต้นยังไงดีครับ

Firstly, you have to love learning new foreign word.
At least one day one word and try to connect it to
simple sample sentence or get learning along its culture,
words relation and contextual situation of the words you have learnt.

Any way, it take a bit long time to have a passion of learning languages.
But one thing I can assure you is love to act as you are speaking your
own language.....and lastly always open dictionary to the word you don't know well