This first tool to either use or help understand how Grid layout works. Very usesful, for getting a visual example of the grid layout rather than having to test. The site then provides the code needed for your grid layout.
Link to CSS Grid GeneratorThe next tool I found is another useful tool to use and slightly has more to offer than the first site I had found. This site allows you to select a few different layouts such as a single page, displaying a layout of the Grid for a single web page. Then also has, entire page layout, pricing plan layout, collages and chess. The site also offers code to apply to your project after you found the Grid layout you want.
Link to Angry ToolsThis next resource is just an article rather than a tool but I think is a useful article to check out because it is easy to follow for learning Grid, the article is brief on each section but still gives you enough information to understand. I really like the Spanning Items Across Rows and Columns section because it gave me a better understanding on how to use the grid-column property so I can be more creative with my future layouts.
Link to Learn CSS GridOverall, I think all these resources should be checked out by new developers or those who are just looking to strengthen their skills with Grid layout. Becoming well rounded with CSS Grid will give developers more opportunities to come up with more unique layouts on their web pages.