Ah, my area of study!
Philosophy does entail a lot of discussion, but on the given subject at hand and always in a classroom environment, not going off to have a coffee and chat. You really need to be able to discuss things by yourself in written form in essays - that’s where all the marks lie and as long as you listen to other’s for and against arguments and lay it down, that’s all that matters.
I think that you may end up really having something to add an as a result may aid your social skills over a period of time - bear in mind that you get a diverse range of people, many also quite shy that can take the subject, and those that aren’t are very open minded and will gently gently understand those who find socialising difficult.
It entails all sorts of things though: religion, politics, the nature of reality (can we believe what we hear and see?), the validity of science, etc. If you are not someone who ponders, don’t do it. If you are, then I think that you will slip into it once you start.