woo hoo!!! finally my first post! haha....ok down to business...

i change my own oil (because i dont trust other people to do it), and i thought about switching to synthetic oil. i dont really know anything about synthetic oil, and would like some advice whether or not to do it (im pretty sure it makes more sense to do it but just asking for clarification). also, if i do switch to synthetic, do i need to do a flush of the engine of the previous regular oil, or can i just drain the previous oil like a regular oil change and just go ahead and put synthetic in? any help and opinions/comments would be great! thanks guys...