It's kind of hilarious to see people giving exact timelines like 60 days. You aren't guaranteed work on Fiverr just because you create a gig, there's no unseen force that makes someone buy from you.
There are sellers that never get orders and leave the site as a result.
What you should be focusing on is ensuring that your gig is attractive to buyers. For example, is there anything that stands out about what you're offering? Why would a buyer pick you over anyone else in your category? That's what you should be thinking about.
One thing that would instantly put me off is that you claim to be fluent in English, but from reading your profile and gig descriptions, you clearly aren't. Why would I trust a dishonest seller with my ad campaign?
Think about that sentence for a second. Why exactly would a specific keyword be "low competitive"?
The answer is because buyers don't use it anywhere near as much as they do with the popular keywords. By using keywords like that you're intentionally choosing things you know are less likely to be searched - why would you do that to yourself? If the goal is to get orders, surely you should be using popular keywords.