Kanji - now or later

Knowing how to write Kanji probably isn't super important, no, but there are a lot of different kanjis that look very similar. Knowing how to write them can help reinforce being able to read them.

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From my learning experience, it's good to get the basics down without kanji. Then you can incorporate them using context. An example would be my first year Japanese class: in chapter 1-3, we didn't learn kanji so that we could focus on basic sentence structure and the phonetic alphabets; but in chapter 4 and onward, we started adding kanji with context. This means learning kanji as a word, not the kanji itself due to various reading. Personally, I find that method to be the best way to learn kanji. Oh, and picturing the kanji as a picture helps too!