Definitely give Tyrano a try if you've already got it :3 I haven't used it since getting Nani, but I saw recently that it got a pretty big update with a lot of improvements, which I was pretty shocked about cos I thought the devs had abandoned the software! As much as Tyrano wound up annoying me in the end, I have to admit that it was absolutely perfect for what I wanted at the time. It was very easy to get to grips with and does what it says on the tin, allows you to easily make VNs with zero knowledge in regards to coding. So I'd definitely still recommend it to anyone who isn't a fan of having to type heaps of code.
And yeah, Nani is perfect for me now, but as you say, it's a journey :3 If I'd have tried to use Nani back when I was starting out with Tyrano, I likely would have been very overwhelmed and confused x3 It's only because I got more comfortable with how to put things together in general that I was looking for something other than Tyrano. I felt like the visual way Tyrano works with the drag and drop was beginning to slow me down. Nani works well for me because everything is just typed. But the code isn't confusing and there are heaps of helpful tutorials and guides/references on the page.
I feel like maybe Ren'Py is probably still better for anyone who has taken the time to learn to use it because the code is more useful in general! Whereas with Nani, everything you learn in terms of Naniscript can only be used with Nani. But it clicks with me anyhow, and I absolutely love working with it :3 In terms of UI as well, I feel like Ren'Py games always look lovely with what people do to make small artistic modifications to the UI. Whereas I hate Unity's UI system xD It makes me want to smash things, haha.