I apologise for posting in the "how-does-a-guy-well-you-know-have-a-conversation.36579/#post-135015" when no-one was supposed to at that stage, I should have read your posting about not doing so. Anyway I apologise for doing that it was stupid on my part.
You may want to look at what Desktop you are using if default Ubuntu one then maybe try xfce and LXDE and LXQT for example not just which distro. You can install other desktop environments with your installation.
Quote"First I should apoligize if this is a dumb question:).
As I know Linux is the safest OS"
No question is a dumb question we are here to help and help share knowledge to help everyone grow in their knowledge of Linux.
Building a distro from source takes a lot of work and time but the reward is a faster system,
Building from an established distro is easier and you will achieve your goals of a personlised distro the way you want it. Ubuntu also offers a system to build a distro.