First time I read about project euler was on Medium. I thought it is a good idea to improve my coding skills.
The problems can be found at https://projecteuler.net/archives. I had a lot of trouble to find the solutions online, until I found out that if you register, you get an input field where you can type in your solution and check if it is correct.
I also found this blog with all the solutions, which is helpful to figure out what can be done better.