The one microsoft application I always come back to because it’s actually the best offering in its field is Visio. There are replacements, but they don’t fill in any missing gaps or fix broken functionality - they’re just replacements. There is, however, one thing missing from my Visio, and that’s being able to share it easily.

Here’s a list of free computer science courses online and material online. Most of these sites have lecture videos or audio recordings.