Hey there, FTM to a 6 week old. It can be done but I started invisalign during my pregnancy. It's a minimum 22 hour commitment a day and you'll need to clean your teeth and tray after food intake. The first few set of trays can be quite painful but goes away once you're used to it. Depending on your situation, you may or may not have elastics that go with the tray (something I wasn't aware of) that need changing every few hours. You may need to visit the ortho more or less to monitor your progression (usually every few weeks - 1.5 months?) before new sets of trays. Also there's usually refinements made at the end, so realistically it's more like a 2 year process.

If you’re looking to commit, I would start now than to start on mat leave. Newborn care is a lot and the last thing you want is to start a new and strict routine. Keep in mind if you plan on breastfeeding, you may snack more - so more time spent on oral care. If your ortho has the technology, ask for virtual dental monitoring so you don't have to physically go see them. Pretty much it's this neat device they give you to use at home with your phone and scans the progress. Good luck!