No no, not for the inside!
It's a deep tissue massage, so you don't need it on the inside. There are attachments for g spot stimulation, but it's hitting all the muscles you need it to hit just from massaging the outside. Kegel exercises will also help if you are concerned about inside bits. Right now you're just looking to "wake up" nerves that have been dormant or unstimulated.
OK, got the hitachi, looking at it and thinking, there is no way........... Are there attachments that you are supposed to use? I saw some when i ordered it but didn't know. Or are you supposed to use as is? It looks pretty darn big to me......
Also, if you don't have very strong orgasms or they hardly feel significant, I suggest a deep tissue massage device.
The hitachi magic wand is a great one. These are not just vibrators, they stimulate the deep tissues that develop strong orgasms. Many women who have never orgasmed are put on therapy with such a device.
The goal is not to use the magic want to reach orgasm, though it is very possible. More to use it for 15 minutes at a time, every day once or twice. Just relax and let it massage. This stimulates nerves deep in the tissue that are dormant for many women. If it doesn't have an immediate effect, hang in there. Some treatments last as long as 8 months without orgasm.
Voiding the bladder before engaging in sexual activity is a good idea... I do that too.
It just feels more comfortable. As for masturbation, you might want to slow things down. That would minimize the squirting. What I usually do is stop stimulation just before I'm about to "let go" and squirt. And, squirting is a good indication that an orgasm has either occurred or is about to occur.
My orgasms feel like a shaking and an explosion from within myself. Sometimes they're massive... and, that's when I let out a scream and sometimes, a giggle. And, then there are times when they feel so subtle that I almost question that I even had one. But, I always know that I did have one. In addition to the shakes and the squirts, my skin tingles and flushes to a beet red color... especially, my face. That's the "afterglow" that follows orgasm. But, it's my understanding that this doesn't necessarily happen to all women. Most of the men that I've been with have told me that they've rarely seen the "afterglow" in a woman.
Another consideration to help achieve an orgasm is a vibrator. You'll really know if you had an orgasm when you use one of those. I like using the kind that both vibrates and rotates. They're available in most adult bookstore and they're a bit expensive (close to $100) ... but, they're very effective and, in my opinion, well worth the investment.