I totally get you. I had gotten accepted in LSE 10 years ago, but couldnt attend, so i just applied again last month. Ill be the oldest in the class probably, but i always wanted to do it. I think it really depends on the subject, if you already have studied it, im sure you can manage full time. But if its something different, like hr, data science etc, then its safer to go for part time. For your own happiness really. Plus, youll get to meet more people that way.