halacha - Can a gentile light a Shabbat candle and do the prayers?

I am a gentile, however I am seriously considering to convert.

I would like to do some of the Shabbat traditions just to get a feel of the celebration (can you call it that?) like light the candle and say the prayer afterwards. I don't know yet whether I am "religious enough" to convert and am hoping for some guidance in the prayer.

Is it okay for me to do that even if I don't yet fully understand all aspects of it? Thanks in advance.