It depends pretty much on the question you are trying to answer.
If you are asking about the actual mechanics of plotting something in R you might want to look at the sources mentioned in New to learning R - #4 by Flm
BTW, the screen shot was fine here but for most questions it is better to supply usable data. A handy way to supply some sample data is the dput() function. In the case of a large dataset something like dput(head(mydata, 100)) should supply the data we need.
See FAQ: How to do a minimal reproducible example ( reprex ) for beginners for more details.