For those who become introverts and prefer to be alone, there are many activities that involve many people whom they can not do. For that, they usually make themselves more relaxed with the situation with some therapy. One of the therapies you can do can be found at https://ayahuascahealings.com/ayahuasca-retreats-peru-sacredvalley/.
An introvert will certainly make them withdraw from the environment that is too crowded. Though there are activities they can do as well. One of them is by playing a musical instrument. If there is a musical instrument you want to play, then focus on how to practice it. There is no harm in starting my practice from now on. Playing music is a good way to challenge yourself and see how far you can set your goals to master the instrument. you can practice on an experienced music teacher as well as learn from the internet about tutorial videos and also a very useful book.