Resources
There are many paths to peace. Meditation is one path. The general recommendation is 20 minutes once or twice a day (usually at a set time). I find mornings and evenings best. The morning meditation calibrates the mind and sets the baseline for the day. The evening meditation helps to settle the mind after a sometimes demanding and stressful day. Initially, it may be challenging to carve out the time for self-care. But where you can, you may find everything else falls easily into place when the mind is calmer and less cluttered.
Free apps:
Healthy Minds Program
Insight Timer
Wim Hof Method
Paced Breathing
Breathe Well
Many top universities and medical schools offer free guided meditations:
Harvard (Click on Mindfulness Audio)
Free 8 week online Mindfulness Based Stress Reduction MBSR course:
http://palousemindfulness.com/selfguidedMBSR.html
Free 7-30 day retreats:
https://www.dhamma.org/en-US/index
Yale University/Coursera: Science of Well Being