How am I going to learn grammar?

We acquire the grammar of a second language the same way we acquire it in our first language. You need to get enough input until sentences start to just “sound right” and you get a feeling for all the elements of grammar. You shouldn’t expect to acquire a lot of grammar right at the beginning, but once you start understanding 2- and 3-word sentences, you will start noticing your progress. Take into account that acquiring the grammar this way doesn't mean that you need to infer the grammatical rules yourself. You don’t need to figure out the rules on your own. You develop a feeling for them without ever needing to consciously think about them. This is what happens with native speakers of any language. Most aren’t able to explain most grammar rules of their own language, even though they use them correctly on a daily basis. The belief that we need to consciously study grammar rules comes from misunderstanding what grammar rules are. A language is not built on grammar rules. The rules were not invented before the language appeared. Rather, grammar rules are an attempt by linguists to generalize patterns they observe in the language so they can be explained with words. They are not what ends up in our head when we acquire the grammar of the language. Research shows that studying grammatical rules does nothing for acquiring the grammar and being able to use it spontaneously.