How to remove ach launcher and install custom launcher?

Iam trying to add a customer launcher after boot can someone help?

I think you can do it with GNU GRUB

GRUB is called【boot loader】。
批注 2022-08-04 084942
批注 2022-08-04 084254

can you help $$$

can you help $$$ iam new to this OS

help with what, you need to be specific

i would like to add a new Launcher & boot animation$$$ canyou help?