Okay, grammar and spelling are pretty self explanatory. Both need to be correct in our narratives. But, having a character speak with an accent is fun. Spell check and other programs don't like it, but they will have to get over it. Here is where you can play with sentence structure. Just don't get too used to it and have a character's bad English spill over to your everyday writing.
Speaking of writing everyday, it's not necessary. There are those who will argue with this, but if you can't get to your manuscript because other priorities intervene, don't sweat it. Pick up again tomorrow. Sometimes, I take breaks just to clear my head. The next day I'm ready to get back at it, and my concentration is improved.
Word count is overrated. Don't obsess with numbers. Concentrate on substance. Quality over quantity. I've gotten really good at editing myself. My first drafts sometimes read like drivel. So what? I can take 3 pages of a manuscript from a novel and pick them apart, rewrite and rearrange until it's right. 5 to 10 pages every few days equals a completed manuscript in a few months. Yes it takes time, but it's so rewarding to see vast improvement.
Social media is another aspect I don't take too seriously. Yes, it's necessary to have a presence. But, I like to unplug every so often, just to get away from the noise. Again, this helps my creativity. I can take a week away and feel good about it. I don't have to be on sites every day.
The trick is to find your rhythm as a writer. Work comfortably. Do what is best for you. Budget your time, write what you know, learn what you can, and do it in a way that suits you. Let your creativity flow. You will have success!