If you skip over the hard parts, then you're not exactly learning a language. You might as well just learn from one of those "Hello, my name is Bob, where's the toilet ? " cartoon books.
Its a bit like those people who learn programming informally. Most of them end up writing spaghetti code for the rest of their lives.
Its the same with languages. Skip the hard bits and your attempt fluency will hit a wall at some point relatively early on. Grammar is tough, but stick at it, it will eventually become second nature. Don't be lazy.