Gathering data is a must when practice time comes. Web scraping is a possibility. Doing it is both a way to get data and a way to tune-up your code skills meanwhile. You might be lead into mastering packages such as rvest; if you do so, you must likely improve your coding skills only by doing so. Also, web scraping goes along with knowledge of HTML, HTTP, and more, so, look for it if you are willing to cultivate a broader set of skills.
If you are not into it, there is no need to go that far. Some R packages come with lots of datasets you can use. There is a web ...