Safely? Use your own judgement. If you're not sure something is safe, don't do it.

Come back here, (meaning the forum,) search, read, ask questions. Even if you think something is safe, you can still do the same things to get a second (third AND fourth) opinion.

This inquiry will no doubt bring you interested suitors but if not or none that appeal to you, you can also put in a personal ad here at the forum (just another thread, no-cost) which many people who don't participate in the forum still will read. And you can go to the chat rooms.

Now... all that said, to be safe, just remember, there are no "rules" that say you must obey all instructions or tasks. There are no rules the bind you to any one dominant unless you wish to be so bound.

Just use your own good judgement. And most importantly, remember to use your own good judgement when you do find your first dominant and realize you can't live without him... because you can. And will likely have to regardless of whether you obey his every command or not... because first time D/s relationships rarely last. There is too much learning going on. And you'll find the more you learn, the better it gets. And not every dom is a good match for every sub.