Hard working adult right here
I for one only have a few hours at most every day and usually only 1 full day on the weekends to play apex, if at all.
I work 8-9 hours Mon-Fri and I've reached lvl 51 by just doing the challenges and playing with friends for those precious hours. (Missed some/ignored some challenges)
Imo Season 2 is much easier to level up in than Season 1.
And correct me if I'm wrong, but me and a buddy of mine did the math;
Complete every weekly and daily in a given week and level up a minimun of 11 ranks, then add the regular gameplay XP and that's atleast 14-15 levels each week.
And to fully complete the Battle Pass you need to level up 9 levels per week to earn lvl 110 by the end of the season.
And can't speak for everyone here but and for everyones private situation, but For me, Season 2 is also way more fun.