I would recommend going for the monthly option instead until christmas, since at the end of the year around christmas the lifetime sale gets $100 off so you can see how you last until then. Of course you can go yearly if you think you’re committed and then get that prorated for lifetime later on when the sale happens.
As for your questions, they are answered in the beginner’s guide which I strongly recommend My Journey of 368 days (+ The Ultimate Guide for WK 📖 ) - #2 by jprspereira