Although meditation helped me to habituate tinnitus (and I have continued to use it to deal with intermittent but chronic pain), I would be wary of taking a cavalier approach to what might now be called 'The Mindfulness Industry'.
Here is one of the reasons why:
https://www.theguardian.com/lifeandstyle/2016/jan/23/is-mindfulness-making-us-ill
In my case, I have occasionally experienced dissociative states of mind. However, I simply acknowledge them and move on. But someone less familiar with meditative practice could find something like this unsettling.
I am also dubious about meditation teachers. Quite a few appear have set themselves up as such without having what I would consider to be the requisite credentials. My reason for thinking this is because I am a schoolteacher and a couple of years ago I started to receive e-mails about Mindfulness courses. The idea was that the basic skills could be mastered and subsequently passed on to pupils to relieve teenage stress and anxiety. However, the whole thing smacks of bandwagon jumping as far as I am concerned, as there is a lot of money to be made if you are a facilitator of this type of training.
On the other side of the ledger, the number of studies that attest to the benefits of various types of meditation have now reached a point where the efficacy of at least some of the practices has been proved beyond doubt. For example, these studies are frequently referenced in publications like
The Mindful Way Through Depression.
In actual fact, if I was going to seek out a meditation teacher, I would choose a Buddhist monk who has had years of experience of full-time immersion in the relevant practices. As cosmonauts of 'inner space', they will have been there and got the t-shirt, and so they are far better placed to help a struggling practitioner navigate the unpleasant thoughts and sometimes disturbing emotions that can sometimes arise from the pot-stirring that meditation induces.
I suggest this approach, even though I don't self-describe as a Buddhist and don't know anyone who is a Buddhist. I am also deeply sceptical about reincarnation and the adulation that is heaped on gurus of various ilks. A good meditation teacher should deflect a student from placing them on a pedestal.
So it's a matter of treading warily.
When it comes to books that describe meditative practices, there are several that I would recommend:
Mingyur Rinpoche
Joyful Wisdom
Steveagen
Meditation: Now or Never
The writings of Pema Chodron, Darlene Cohen, Steven Batchelor, Matthieu Ricard, Vidyamala Burch, John Kabat-Zinn and Brad Warner are also worth exploring.
Two accounts of personal experiences of the benefits of meditation written from the point of view of a novice are
Teach us to Sit Still by Tim Parks, and
Why Buddhism is True by the hard-nosed evolutionary psychologist Robert Wright.
Here's a link to an interesting article by Wright:
https://www.nytimes.com/2017/11/06/opinion/buddhism-western-philosophy.html?smid=tw-share
TheDanishGirl, it's a matter of taking things gently and not being too hard on yourself when it comes to the early stages of practice. The book by Mingyur Rinpoche mentioned above should help you to overcome a tendency to identify strongly with negative thoughts. It's something that happens to me regularly too, as I am not much further along in this regard. For example, I have a tendency to catastrophise when I find myself thinking about the future as far as the other health conditions that I am dealing with are concerned. But it's a pattern that I am slowly coming to recognise and step back from.
Hope this post proves to be of some benefit to someone.