For most personal projects, hosting on the cloud may be overkill, but tempting with its supposed ease of use and benefits of scale. Self-hosting is often overlooked as a solution with the benefit of simplicity and cost.
Interesting discussion and demonstration of self hosting the kinds of apps most personal projects will end being.
“Maybe.” You’d have to try and see. I’ve mostly been on the cable networks so YMMV. The first issue would be if they block commonly used ports which should be fairly easy to test.