If you are doing this at home, you need to download the Creative Cloud app from Adobe, then sign in as instructed above. You can then download Photoshop etc. from inside the Creative Cloud App.
You can use GIMP or Photopea(closer UI to Photoshop but web based and less powerful) in lieu of Photoshop. I personally prefer GIMP of the two. In terms of replacing Illustrator you could use InkScape. For basic Video Editing, the free version of DaVinci Resolve is adequate, though not open source.
If you have any questions, please email. I will endeavour to get back to you within three calendar days.
The fastest way to get a password to access student content is by asking for one in person. If you are not a student you should be able to acquire one from your child/ward.