Thank you so much, both of you.
I totally get the point, and yes—I didn’t convert my curve to a mesh, but that’s not the problem I’m facing here. You see, I’m not just saying “join the objects,” but when I press Ctrl+J, it doesn’t actually look like it’s the same object. I want to blend them to look like it’s a same obj.
I tried using the Bool Tool after watching a YouTube tutorial, but it’s not working properly—it doesn’t look very good. That’s why I’m requesting: could you please check it? I shared the link—just give it 2 minutes and please tell me what the problem is.
I really appreciate your help, Martin and Omar.