How do I make friends as an adult?

I am a 26 year old female. And everyone i work with are around my age. There are 2 girls that I share a lot in common with and want to ask to hang out with them outside of work.

I moved away from home and have no friends here but I am too anxious to just be like do yall wanna be friends.

Like I already have one of their numbers but am too scared to like ask the other one for their number.

I just feel like the three of us would be good friends as we chat together often at work.