What should my every day routine be ?

First I want to apologize for all the question I'm asking and if any of them have been asked already again I apologize 

I feel like I'm not a very good singer but at the same time on a good day can hold a note. For someone who wants to take this super serious improving my voice and extending my range what should my every day routine be ? 

what warm ups should I be doing and what else should I be practicing? 

does singing random songs all day help my cause or harm it ? 

im on month 1 still lesson 12 I believe but I'd still like to know if I should be doing anything on top of these lessons 

thank you 

It's important that you're warming up and exercising your voice regularly (daily, if possible). Think of that as going to the gym: stretching out, getting stronger, and keeping in shape. You can find all kinds of warmup routines here: https://www.30daysinger.com/warmups.

In addition to your warmup/exercise, you can learn and practice via the other tutorials on the site, or on your own (with ear training, song work, etc). It's certainly not harmful to sing throughout the day - I think it's great that music is so present in your daily life! For me personally, I sing throughout the day (often without thinking about it), but my practice time is distinct and more focused. 

Best of luck!