Tips For My New Shopify Store

Hi guys, I am about to start my new one product Shopify store (health niche). I made my research and i really think that i got my winning product, already ordered it to my place and when it will arrive i will make a great ad video. Any tips before i launch my store?

1- Make your checkout easier.
2- Make a good description of your products.
3- In the case of shopify install apps like:
Sales Pop
Ultimate Sales Boost
4- Try different audiences (Facebook ads).

What tips exactly you want to know? Too general question. If about general answers, I would suggest you using free shipping. Don't use pop-ups at checkout phase, don't use too many badges, timers, etc, make your site as clean as possible, make a good description and also post a video on the product page.