When is a good time to ask out a guy?

So I have this big crush on a guy. Granted I haven’t seen him in a couple months or haven’t talked to him but that will all change once I’m good to start taking classes again. Before, he was really helpful wanting the best for me and making sure I understood the content. We don’t follow or have each other on any social media. I’m just wondering when I do go back to classes should I just ask him out for drinks and see what happens or would that be too straightforward? It’s hard to tell if he likes me or not. I have made him blush a couple times, but when is a good time to ask him out or should I just play it cool and see what he does.
Updates
5 mo
Or should I try and add him on social media? Or would that be too weird rn. Maybe I’ll wait till I go back to classes and ask him in person.
When is a good time to ask out a guy?
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