If you are having fairly constant & annoying symptoms/pain I suggest finding an advanced PT, or even an expert chiropractor that will do PT type modalities. If it is more of a minor discomfort you can probably try to work out a plan on your own, but sometimes it is better to at least have someone to guide you at the start. But not a rookie or macho type that insists on pain = gain - no way!!
But a good one should be able to help you get on the right track with some sessions and then to develop a self care plan for you to follow.

Doing to much too soon, or going hung ho & overzealous on new things is a good way to have a set back, TOS type stuff needs slow and steady to move forward.

I still did a lot of reading and searching on my own for more things to use & try on myself for my symptoms & issues.

There are also nerve glides in our useful sticky thread post 18 or so I think.
those are good for when the nerve is stuck or trapped.