Those you are beginners should always go for free WP templates as you can always customize them according to your needs and it does not burn a hole in your pockets.
There are many free WordPress themes are present that you can select to create your websites. Free WordPress theme with a slider for free and are easily available online and they are totally free.
Some of the best free WordPress themes 2019 are offered by Themes21 https://www.themes21.net which is the premium place to download WordPress responsive free themes.