I’m going to date a lesbian for the first time?

I just graduated college a few weeks back. I’m 22 years old and leaving college is definitely abrupt especially considering I know a bunch of people still in college.
There’s this one girl ( a lesbian ) who I’ve had a couple of classes with in the past. Once I was walking up to my desk and I caught her staring at me and we had another class the next semester and I definitely caught her glancing at me a few times but her and I never talked.
I think she would’ve been interested but I was also in a relationship and wasn’t interested in her until a certain point.
I made a new friend my last semester and I found out that the new friend follows this lesbian on social media. They’re both still in college and 21 but I think they’re graduating in May. I don’t know how to approach the situation and I don’t have Instagram other wise I would just slide in the lesbians dms lol so I’m not sure what to do without being weird? Should I just let it go? I’m not looking to necessarily get in a relationship but I think this girl could be fun. I don’t want to bring her into anything confusing because I kinda have a crush on a friend of mine but we both know nothing could happen so I don’t want the lesbian to seem like my backup option.
On the flip side, there was a period when her and I had class together where I was really into her so I don't know. Should I add her on Snapchat? If so, what do I say?
I’m going to date a lesbian for the first time?
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