How can I migrate website to wordpress

I have created a website a month ago about [grinch suits]. The website is in initial phase and i can’t really afford the fee of shopify. Now i want to migrate my website to wordpress but i’m not aware of themes of wordpress. Can anybody suggest me some of the best themes to be used for one-product website.

Thanks

Hi there

You can check free themes here: Best Free WordPress Themes 2022 - Colorlib
and premium themes here: 40 (Most Popular) Best WordPress Themes 2022 - Colorlib