I was asked many times as to what to do next once you have learned how to dance salsa. Generally, depending on how well you absorbed the lesson, you should go out and dance at socials or clubs with other dancers for a little bit before taking further lessons. Get some practice in. That is important - PRACTICE. You will know when to take the next step. Just be honest with yourself and do not overrate your skill level (most will).
Here is an article to read. It is short. http://www.salseroblanko.net/Article1.html
Until then, KEEP DANCING, KEEP LEARNING AND KEEP HAVING FUN.
Have a nice day.