My recommendation is to stay away from Umbrel and Citadel and just go the Raspiblitz route. You will learn A LOT more and in the end have something you'll be proud of and won't want to change to another platform. If you go with easy route (Umbrel/Citadel), you will learn some but in the end will probably want to do it all over and go with something like Raspiblitz but by then it will be more annoying to do the migration assuming you have channels.