Ok, so there is this website called Leetcode. It has a bunch of coding problems on it. But perhaps it can be a little daunting as it has thousands of such problems.
Which problems do you start with first? Well, there is a great resource called Neetcode started by someone who I think became a SWE at Google.
At The Neetcode Roadmap you can find a directed graph of Leetcode problems broken down into categories. I'm starting with the Neetcode 150, a collection of 150 problems. Once that's complete, I'm planning on moving on to the Neetcode 250 and doing the extra 100 problems in there.