Your step 4 is to ask them on a date. Not to hang out as friends but on a real date.
You could say something like "I've really enjoyed spending time with you and am wondering if there might be more than friendship here, would you like to go on a date Friday? There's a show I think you'd like and I'd love to take you to dinner before?"
This step ensures that you're clear there is mutual interest. Then when you're at the show you know it's likely appropriate to hold hands and see if the spark continues, grows, or shrinks. If it continues you can take it as fast or slow as you and they feel comfortable with while checking in regularly by saying things like "I'm really enjoying this, would it be ok if I kissed you?"
You are the only one who knows your comfort reading social cues (and honestly, I still check in like this with my wife who I've been with for 16 years from time to time to ensure I'm not misreading cues).
Be up front and clear about what you're hoping for at each step and open to the possibility that they might be hoping for something different!