1) Sorry, haven’t used Wani, so can’t say
2) I aim for 30 minutes a day, sometimes, maybe once a week, a 2 hour session. But with work and other things I may do zero. That can’t be helped, no point beating yourself up about it.
3) Having goals keeps me on track, motivated. Also, variety. Do something different, just reading or watching something, may not sound like typical study, but it is still learning.