This is a very good question! Well, the first thing to understand is that it is a different concept of time travel than what is commonly known. For example, in the beginning I had to spend 10 years working through a family history from 500 years ago. Sometimes it only takes days, weeks or months to do these things. And you should prepare for it or ask if you are already prepared. For example, not everyone can become an astronaut and some are well prepared, others not so well and others can't make it. On the other hand, the fact from my point of view, that we are all already traveling through time and that we have already achieved a lot on that path, whether consciously or unconsciously, also plays an important role. So the first question would be, what is it about, what do we have to do in the early 80s?