They say that kids learn languages the best ,but that doesn't mean adults should give up .I personally think

1.Get real .pick up 40-50 words of a language and start using them on people ,and then slowlu start picking up grammar .

2.Make language as a lifestyle change .

3.Let technology help you out.something like resetting the language on your phone can help you learn new words right away .

learning two languages at the same could be difficult ,but you can find some simple skills to learn the basic ,then to see if you can go further ,like going to another country and  trying to talk natives .