Start telling everyone you know you play bass. Everyone. Do Facebook posts about your progress, post pics, etc. Go to places where they have live music. Chat with the musicians, compliment the bassist on his playing and on his gear. Meet the folks and instructors at your locally owned music store. Pretty soon, you will start hearing things like "so and so pays drums", "so and so plays guitar". Don't force it, this is the time where you have to be yourself. Your circle of friends will begin to expand where all of a sudden, one of these new friends calls up and tells you to show up with your bass.
I came late to bass. Been wanting to learn since I was 14, but wasn't able to embark on this journey until I was 50. After about 6 mos of lessons from a neighborhood high school guy, I was invited to do some jamming with his parents who did bluegrass GTGs in their living room every month. They had an upright for me to use. Everyone brought a dessert, a snack or beverages. Bluegrass and upright not really my cup of tea, but it helped me meet people and get used to improvising. It took me a long time to find people I really like to jam with, people I really connect with, but every step along the way, no matter how insignificant, played a part.