How do I get visitors to my website?

Post quality and engaged content, Build link from a high traffic site,it can help with quality traffic. Also try social media and promote it and reach target audience

For the long term you can invest your time in doing SEO with longtail low competition keywords and get organic traffic from google.

Along with that create a good social media presence and each time you publish something on your website, share that on social media as well. It will give you social signals that will help in SEO.

You can join facebook groups related to your website and engage with other members, network there, share value through your website that's how you gradually grow your visitor base.

If you want to go direct then you can purchase traffic from available adnetworks but if your website doesn't generate any revenue yet then i suggest avoid doing this.

First of all, you have to write unique content, then you have to add backlinks from highly authorized sites, guest posts and promote it in social media to increase website traffic.

What is your site about? You need to target people interested in what you are offering.
You can do that in a number of ways.
Write posts that give good value of around 1000 words. Optimise with your main keyword and related keywords.
You don't always need to write for keywords, but it does help.
Install the Yoast plugin and ensure that you have met all the optimisation criteria.
Drop your post links in sites like Quora when answering questions.
Get social signals.
Create a YouTube channel, create videos and link back to your site/posts.
Embed the video into your post.
There are many ways.