Welcole!

Skipping grammar in Russian is a big no no, because you can end up learning the same word 10 times, simply because it was conjugated in a way unfamiliar to you. That still happens to me despite knowing the basics of the grammar, but a heck of a lot less.

So, yea, you should have fun and learn words, hear words, use words, try construct sentences, watch movies maybe, etc... but simoultaneously invest some time in understanding how the grammar works.