Finding a therapist
Taking steps to get help reflects a courageous awareness that what you have been doing isn't working. It says that you are not willing to just carry on, hoping things get better.
You start by finding someone to talk to. When you go online, you'll find many psychotherapists, counsellors, and clinical psychologists. Click here for a brief explanation of the differences. (I will use the generic term "therapist" on this page.)
If you have a diagnosis or a named problem, you can search on that; it can help if the therapist has relevant training. However, you could be screening out therapists who don't specify that issue, but who describe themselves in a way that you can relate to. Research has shown that the single most important factor in the success of therapy is the relationship between therapist and client. That makes things tricky: how can you know how you'll relate to someone before you meet them?
Here's a suggestion: ask your GP for a recommendation, and also search online to see who stands out. Respect your intuition. Come up with a short list, and call the therapists on that list to ask them a few questions. If calling several therapists seems too hard, just choose someone from your list and make an appointment.
If you don't want to continue with that person after the first session, you can say so. You will not have wasted your money or your time, because in the process of discussing your issues with that therapist, you will have clarified them for yourself, and that will facilitate your work with the therapist you eventually choose.