I'm using New Member Followup.
On day 1 new users receive a large message with a warm welcome, an explanation, why I founded the community, the hint where they can introduce themselves and with instructions where they can try out the handling of the forum (a test board) and where they can find their profile.
On day 7 they receive a hint to the clubs, on day 15 to our newsletter, on day 23 to member map and their benefit, and on day 31 to our weekly chat and monthly video call.
until