I have completed hard copy forms for POA and am waiting for the Court of Protection to register them. There are 2 of us and each of us have nominated each other and both sons. It was not complicated, but what made it confusing was all 4 of us have the same surname, I had to separate the forms to get all the witness signatures, one through the post. The forms for Financial and Health are almost the same. I got in quite a muddle and it was a headache for a long time, because of the difficulties in having to have a little physical contact with people. I could not ask a neighbour to pop in to witness signatures, and each appointee had the same issue.
So my advice would be
1. Be methodical.
2. Keep all packs of forms together, but separate
3. Do not attempt it during a lockdown!
Incidentally, I had some parts of the forms returned because of an omission/error. I was not billed for this.