Ask her out on ice skating when she mentions wanting to go

This isn't a question she's asking. It's a statement of desire. People rarely volunteer what they've been wanting to do unless they're willing to do it, especially when texting someone they're interested in. She's not asking for ice skating recommendations or telling you about a hobby. She's telling you about something she wants, which in the context of a conversation with you is an opening.

The signal here is straightforward: she likes ice skating and she's open to the idea of going. Your job is to convert that into a plan, not to gather more information about her preferences or double-check that she was serious.

Your reply should land as a plan, not as you seeking her input on whether a plan is possible. Name a specific venue or at least a neighborhood. Name a day of the week or a date range that's actually coming up, not 'sometime soon' or 'next month.' The reply should feel like you heard what she said and you're already thinking about when it could happen.

Then ask her if she's in. This is different from asking if she'd like to go or if she's free or if she knows a good rink. You're presenting her with an option that requires only a yes or no. That removes friction and makes it easier for her to say yes.

Reply while the comment is still fresh. That means sometime the same day or the next morning if the message came late. A reply that comes days later feels disconnected and suggests you weren't actually thinking about following through.

Once you send it, give her at least 24 to 48 hours before you do anything else. If she doesn't reply after a couple of days, that's your answer. Don't send a follow-up or ask her if she saw your message. If she's interested, she'll confirm. No reply means she was speaking casually or something changed, and pushing harder doesn't fix either of those things.