Do not make the classic mistake of a beginner in the knowledge of the blockchain. You want to pull an owl on a globe using blockchain in online training. Yes, you can knit an assessment system on it (so that it is impossible to fake grades), use it to register students for courses or departments, and at least write out food stamps in the nearest cafe-partner of the university. But why all this? An absolutely useless use of technology. Don't do it like that - it only makes life more difficult for yourself and others. We stil have SQL there