Advice would be appreciated!

Hi! I'm a 19 year old university student from England and I've recently came out of a long term relationship (five years). It ended quite well, we both just changed to be honest. However, my issue lies within the whole 'dating' scene.Due to being in a relationship from a young-ish age, I completely missed out dating and don't quite know what to expect.Since breaking up, I've kissed guys in night clubs and even had fun with straight guys, I just don't quite know how to approach dating. Some people tell me to avoid apps, where as some say apps are fun and easy to use.Any help would be appreciated really, thanks.