Not all lecturers welcome questions, it depends on the country and culture. Certainly my own undergraduate experience consisted of a "human text-to-speech engine" experience where the lecturer lectured mainly from a text, while students were expected to silently listen, and then answer any questions they had themselves by searching in the literature.

When I moved on to graduate studies and had a weekly seminar, then questions and discussion were welcome, but I sympathize with the feeling that in-person undergraduate education is a waste of time and (in countries that charge tuition fees) money.

I really didn't ask many question during my career as a student. The whole thing really was an exercise in obtaining credentials.

Did you visit public library recently? It is closed or full of homeless people. Scihub and laser printer is much better option!

For $50/hour you can find experts in most fields. You could even hire underpaid postdocs who teach at unis.