Not knowing the backstory behind "How Long Have I Been There," it's hard to give a full opinion on it. That being stated, it's not a terrible title, especially for something like an advice show. Sounds close to "I've been there," which is a bit more immediately descriptive in terms of what your show is about.
The only advice I can give you re: explicit language is that podcasts without it tend to be open to a wider audience. Many people listen to podcasts with the family (kids) within earshot so they'd probably avoid a podcast that carries an explicit tag. That being stated, I listen to plenty of podcasts that do carry the explicit tag (and produce one myself). So, there are still plenty of people that will listen to a show like this. Also, make sure whatever platform you use to distribute your show will allow you to add an explicit tag to your RSS feed. If you don't do this, and someone reports your show on iTunes, they will remove your show without warning.