Please use the accompanying resource available as a handy reference for basic concepts and syntax.
A personal website is the perfect first project for learning programming. Try to use a combination of resources to create a minimum viable product. Challenge yourself to create a minimal layout.
A few shortcuts can sometimes keep it simple, like this vertical centering technique for putting children in the middle of a parent.
.class {
margin: 0 auto;
}Full explanation available on the popular programming community: stack overflow question about margin 0 auto
Flexbox is a modern display system that spreads items over a vertical area by default. Try to replicate a layout that you find on youtube - flexbox has too many parameters to learn them by heart. Let your needs decide what to focus on.
My pick for best youtube channel on the topic: Kevin from CSS trcks! Repeat topics that become relevant for your personal project, often in the form of bugs.