Though, I never really tried out Lichess4545, but I know that it's great for playing lichess leagues associated with different teams.
lichess.org/team/lichess4545-leagueThis team, is the official team for Lichess4545 leagues.
I highly recommend it, its great to improve at chess, seems you are an adult improver like me, its a great way to get long classical games and people are very friendly, there are multiples seasons per year so you don't have to wait too long to join!
If you like longer games in a friendly team environment then you'll like 45/45 league.
I have played many seasons there and have enjoyed them all.
As pairings get announced on Monday and you have all week to schedule your game, you will get the chance to do a little prep for your upcoming game too if that's your thing.
On top of that John Bartholomew has endorsed it many many times in his streams, what's not to like?
