Some writers dream of fame and fortune. Heck, I'd just like to entertain someone. I'd like at least one person to say, "Thanks for the story. For at least a few hours, it transported me to a different place and for that time period, I forgot I fell into the story."
This is exactly how I feel about my writing! As artists, we are entertainers. That's what writing is all about, not the money and not the fame. (although, if those come along as well, I won't be complaining! )
Your description of your writing process made me laugh because I think we all can relate to that. I'm personally entering the first round of edits on my third book in my series and I'm at the "Why did I ever think this was a good idea" stage! The ranting, raving and throwing breakable objects stage will probably commence in shortly.
Best of luck with your journey. You're off to a fantastic start! You've also received some solid advice on your content here. I agree with most everything that's been said. If you don't feel comfortable with so much profanity, don't do it. If you don't want a sex scene, don't put it in. You have control over that. Use it.
I would like to add one little anecdote from my own series, if I may. I write suspense novels that are character-driven and have a touch of romance in them. While I was writing the first book, I had to decide whether or not I was going to include sex in the series. After a long debate with myself, I finally decided that adding the sex would do nothing to move the story along. I discovered that I could deepen the characters' relationship that was in question without adding an ultimately pointless sex scene. Will this cost me readers? Only time will tell, but so far it doesn't appear to. In my case, I didn't add it because it didn't make sense in the context of my characters or goals for the book. Only you know what you want to accomplish with your characters. Follow your gut and write them the way you feel led to write them. And remember, it's YOUR name on that book. If you don't feel comfortable with what's in it, then change it.