> I must continually remind myself that I am the instigator and it's feels quite strange as a heavily introverted person. I don't particularly enjoy being the instigator

Once I figured out that this was a skill and not just something people that are not me are born with, it made things a lot easier. Went from making up all kinds of stories in my head about myself and others to thinking about each interaction as practice and realized lot more people were like me, thinking I'll be invited somewhere or talked to if I was liked or was interesting enough; waiting for someone else to do the inviting or talking first. I just remind myself that a lot of others also want to be invited or talked to, and that reminder greatly reduced my fear of rejection.