Grace, if you are motivated, there are tons of good books on many languages that you can simply read on your own. You should buy a compiler program that allows you to write programs on your own computer and run them to see the results. For example, you can buy a book on C and a C compiler for your computer and work out the examples and assignments in the book. You will see if your program gives you the right answer on your own. If you make a mistake, you will know right away, as you will get the wrong answer, or possible the program won’t compile in the first place if you make a syntax error. It will tell you what type of error you made, and you will have to correct and recompile. You learn from these errors.
There is even a book called C in 21 days.