You can try some book nooks. It gives satisfaction and also good as decoration
You can try booknook or super creator series
If you like the smaller sets I recommend the older series. They are MUCH more involved builds. They even come with paint. You make most everything from scratch.
If you want a larger full size kit with medium difficulty then I recommend the Garage or the Baking Kitchen sets. If you want something really really difficult I recommend Cathy’s Flower House.
If you go on the website and check out the difficulty rating of each build, you can choose the level that you’d like to try. I love these small builds…so cute!
Some book nooks might be harder X
The garage is a nice one and the A-frame.
I agree with @Jerry_Boswijk . Both models he has suggested are a bit more work then the smaller kit you have completed. As suggested by @Tkaplan , the Robotime website is an excellent place to find lots of options. If you’ve never tried a wooden model by ROKR, it might be time to check them out as well. Whatever you choose, I am sure it will be an amazing experience.
They look so beautiful.
Thank you ! Im looking at the alice in wonderland one x
Thank you ! X
The kits are so cute. 
I think you can able to build more complicated kits. Just follow the instructions thoroughly and I think you will not encounter many problems. You can also ask here if there’s an issue that you can’t resolved.
Thank you
Nice choice. That’s a cute one
I second the book nooks. They’re a nice step up and come with different difficulties.
Or you can move on to the bigger miniature houses or try some ROKR puzzles.
The possibilities are endless because they’re so many different products so I say browse the website and start with one that catches your eye and then check the difficulty level. 
Well done.
I enjoy the smaller builds in between bigger and more complicated ones. You’ve been given lots of great ideas for others. I like the book books as well. Whatever you choose, have fun.
You can try bigger kits, miniature houses and book nooks for more challenge.
Cute!! Im making the muse today! I personally need the post office left for this series but I cant find it in my local stores right now! 
Great job on the builds though!!
Great suggestions already shared here! 
Book nooks are a lovely step up, and the older Rolife kits are definitely more involved if you’re looking for a bit of a challenge. It really depends on whether you want more detail or more complexity, but either way, enjoy the journey. That’s the best part! 
Booknooks are way more complicated than miniature rooms. Almost 95% of it using board, paper and there’s wiring for lighting!