Ooh, dw I don't take offense to that, in fact I'm glad my work could inspire you to create too!
The plot sounds interesting already, Kaede seems like an absolutely insane person and I'm looking forward to see his creepiness in action LMAO. Grabbing the MC's comb just to steal her strands of hair is just peak yandere behavior and I love it, the dolls too.
This other guy also seems really cute, I enjoy characters with double lives a lot, and he seems mostly like a cinnamon roll (boy I'm gonna jinx it aren't I, he's going to turn batshit or something LMAOAO)
As for the home screen, honestly I just used the default ones and changed the position and font. This particular video might help you with that: https://youtu.be/_zq3V28qp2w (any of Zeil's tutorials are a massive help tho, go check her channel out and see if there's any other tutorial there that might help you)
Text border is... I'm assuming the dialogue box for the game? You can find the dialogue box file in the GUI folder (I think) and just change that file directly into whatever you want. Here's another video that could possibly help you with it: https://youtu.be/AHuIHrvBBII
And you can absolutely use font generator, yeah! I just typed the original text in like those zalgo font generator, then copy and pasted the result to the script. Put a {nw} tag afterwards to have it seem like it abruptly stopped, then boom. It works just fine.