Yes I’m familiar with such situations. You know you did it before but it is that long ago that you hardly remember how. And knowing that there were some pittfalls, but not remembering which, it’s difficult to start.
Not long ago I had to install Linux on a new laptop. I had done that several times before but now I could not find myself doing it. Luckily I knew a bicycle loving forum maintainer for whom such task were peanuts. So while talking about bikes and bicycles and drinking coffee all was done.
Every day that I use linux I feel thanks towards him. (So now that I have said this I feel releaved).