Well, i started to get interested in BDSM, i had a vague ideea what this was, while browsing sites i have found my actual Master, he opened my eyes, guided me and collared me. I would say if you have someone in the lifestyle as your partener or future partener, you rely on his judgement( of course, once you know he is not a crazy fuck that will do some ireprerable damage).
If you want to enter with someone in this lifestyle, it becomes a journey of discovery for both. I have not understood from your post if this person is already in the lifestyle.
My advice would be not to rush, there is such a big palette of things to discover, just take your time and enjoy!