i am coding offline. when i am done then i will copy and paste it in in codepen your forked. if i got 100% i will submit the codepen your forked link and move to the next project. is there any problem with that? and where will i get the link you requested from me?.
Take a look at this webpage which details how to create a fixed sidebar. Pay close attention to the comments they make aside each CSS line. Especially the fixed property. Which will be the building block to getting yours to look similar to the example you’re trying to replicate.