Can someone help me with this h1 tag

Your webpage does not contain any H1 headings. H1 headings help indicate the important topics of your page to search engines. While less important than good meta-titles and descriptions, H1 headings may still help define the topic of your page to search engines.
H2 headings
Spectacular croatia photography

I dont undrestand this,i use h1 but there is no show on seacheckup.My score is 78 to 81 is good.I have 6 page with 1st and engine search on google with monthly 10,000 search its new domain and for now its low visitor about 500 monthly.

But can someone this explain i use like this

spectacular croatia photography

then
h1 spectacular croatia photography
paragraph
story 100 word
h2
story
h2
story
h3 story
and that its.
using yoast seo and its good everthing but why seocheckup show and other h1 checker show that my h1 dosent show it.

It's not only your problem. Even I use h1 heading, but when I checked my on page seo score, it shows that I didn't use h1 tag. May be try some other tools.