Three things I'd recommend.
Headspace App, this helped me get going twice a day. It has achievements so it added a rewarding feeling to progress.
Joseph Goldstein - Big Mind meditation, this guy's voice is great, very slow and calming. Helps take the edge off of sharp sounds for me.
Vipassana Thinking Meditation on youtube, this one helps clear the visual and auditory backlog.
I found it best to find one technique i really enjoyed and keep going with it. Try a few out and find the one you click with most. ie. Focusing on the breath, noting thoughts, noting emotions, body sensations, sounds, being silent.
For benefits, I still stress the same amount but the length of time is much shorter that the stress affects me. I'm more aware of it and instead of stewing over something for days, I can get over it in a few hours(sooner if I meditate). It helps me see that there is distance between me and my problems and I can focus on meditating instead of stewing.