Hi I just joined and started from level 2 as I had singing lessons for 3 yrs , I wanted to know how to follow the daily exercises cause they change I wanted to know about before starting do we need to warm up first thank you

Great question, Mark! Yes, since each day covers a new skill with accompanying exercises, it's best to do a short "general" warmup before watching a new lesson. 

You can see here for guidance: https://www.30daysinger.com/blog/one-lesson-per-day-how-to-practice-for-the-best-results. A typical day could be warming up (with the general warmup provided), reviewing yesterday's exercise (espcially if you found it helpful), and then watching the new lesson. You can also stay on a lesson for more than one day to review and reinforce that new skill.