There are a few different factors that will determine how quickly (or slowly) results will come. But none of these are factors alone will affect how well your website will be ranked on Search Engines.
These factors include:
How much content you create
The quality of the content
How the content resonates with your audience
If you're a big or small site with strong or weak domain authority
A large site could possibly see results in a couple of days if a search engines is crawling their site regularly. Smaller sites will most likely take longer because they get crawled less frequently. Wait at least a week, but probably closer to a month, before you consider changing your SEO strategy -- a bit longer if you're brand new to SEO.