What are you currently hooked on? Fantasy? Sci-Fi? Historical?
Came back to wargaming after a looooong break and got back in with OnePageRules' Warfleets beta. Been playing a lot of that with the couple people I've roped into playing with me. Currently drowning in STLs from patreon subs that need printing/painting for when I get around to trying Grimdark Future but I haven't found any other players nearby so far, just lots of Malifaux and 40k players.
Just set up my new copy of War of the Ring. Never played before so I'll be learning as I play. On my big table I have Death in the Trenches set up but I'm almost done with that. Once that's done I'll be replacing it with Pacific War, I'm also playing that online with a group but nothing beats the physical game!
Well for me it's taken a long time since I can only play in about 15-30 min increments since I've got a kid. However I'd say an experienced player(s) would probably take about 4-6 hours? Definitely something you could finish in one day if you started early enough. Definitely faster than some of the more heavy wargames that's for sure.