New wiccan here! As i am on the solitary path..how do i know the right time to perform my self dedication rite?
As was mentioned, it's traditional to have done at least a year and a day of study and practice before doing any sort of formal dedication - and as a solitary, some choose to wait even longer than that. Having a year and a day gives you one full turn of the seasons, time to know each holiday, time to learn the basics of Wicca, and time to try out different ideas, methods, etc, have some practice with ritual, to see if this is really something you want to dedicate yourself too.
Some solitaries never actually do a self-dedication, either. For them their continued practice and study is enough to show their dedication, and no specific ritual is needed beyond that. It's a pretty personal thing, of course, and you should do it (or not) when it feels right, but it's a good idea to really give yourself a good bit of time, let the "newness" wear off a bit, maybe explore what else is out there, before you make a more formal commitment.