You need to wait for at least 4-6 months to get the proper results and there is a lot of content out there for traveling and tourism. You need to prove that your content is better than theirs then only you rank up higher.

And you wrote about 15 articles in 2 months which means about 2 in a week of about 1200 average. I have not much experience in writing tourism blogs. But you gotta check your competitor's blog and check out their average post's length, SEO keywords and try to produce better content than theirs.

Then there will be no reason for your blog post to rank lower than theirs.

But this may even take more time than your competitors invested in their blog.

so Good Luck.

Hope it helps