Ok, keep in mind, I am pretty much straight forward usually but I don't mean it in a bad way

plus TBH I normally don't like to give these tips because although basic and most of the times logical it's those small things that keeps me ahead of the competition but I am in a good mood
As i already said, the url, there are actually people and I am one of them, if I see "yourname.myshopify.com" I don't even bother to look what you got, for me, with a domain url like that looks unprofessional.
Which brings me to "yourname" it's pretty long already and adding the shopify extension, it's too long man! Imagine I thought your shop was great and a friend ask me, where did you get that? I would need to tell him, "Yeah, from yourverylongname.myshopify.com" just doesn't roll well on the tongue.
Also, you say your niche is GOT and yet I see stuff from batman, harry potter, grand theft auto, star wars lol, most of it are necklaces and keychains so either shift your niche to that or stick with GOT.
Your homepage meta states: Free game of thrones products.. but when I check your items some have prices on them and others say $0,00,- this is a typical noob mistake and seen many do it and having the same problems as you. It's unclear for customers what is going on and they will most likely assume that the website is broken or under construction/testing phase. Also these green sale images are on top of the "xx% off" tags so you can't read what they say.
The "about us" and "shipping info" could use some more words and in better English as it's full or grammar mistakes (mine on the forum also but on forum I never check if it's correct) there is no contact page whatsoever, you should add a Faq page and there is not a single icon linking to any social media page you own.
Last week there was a guy here that made
exactly the same mistake as you, offering "free" stuff but like your website, you have to pay for shipment, people don't like that shit. He also had barely any info on his webpage, no social media linking, few items and spend almost $100,- in fb ads and zero conversions.
Now as I sorta ripped you a new one I will give you some tips which you should carry out before spending one more dollar on advertising.
Tip 1: I don't know if you already bought a domain but if you didn't go get one at godaddy.com for a dollar and link your shopify to that domain so you won't see the amateur "myshopify.com" anymore (which means, also remove the "powered by shopify in your footer") and if you already own a domain, great, same advice.
Tip 2: Choose what you want, you gonna stick with necklaces and key chains from different brands or you sticking with GOT? Choose one and add a SHITLOAD more items, dropshipping is already over saturated, you can't compete with the big boys with just 30 items.
Tip 3: Add more information to your website, so a Faq, more info in the "about' & "shipping order"section, also make a disclaimer which you will certainly need with dropshipping.
Tip 4: This is 2017 bro, social media is key to success, you need a FB, IG, Twitter, Pinterest and all that kind of crap to keep up with your competition, also link em to your website and vice versa man, the more back links your site got, the better.
Tip 5: Get mass planner, join groups in your niche, if the group has non stop spam of people promoting their GOT stuff, leave. Otherwise, stick around, don't promote your stuff yet, just like some things, small comments and then you can come with some kind of promotion.
Tip 6: Just cut this whole "free items, paid shipping" bullshit, it won't work! People will get upset as they only read the word free and then get pissed off they have to pay for shipping. You should do it the other way around, price your items and say something like, free shipping worldwide.
That's it for now, it's kinda late here so getting tired. You don't have to follow my advice of course and go with silly advice like "Split test 10 different ads" but that will give you no ROI if you haven't at least followed my tips.
Peace.