If possible, use a local solicitor, where you can go into an office and have a face to face conversation with someone.
Many solicitors will do home visits at no extra cost if you are unable to get to their office.
All of our 'stuff' is sorted out, passwords, account numbers, house deeds, wills etc, and kept in a wall safe. It has double protection, key and seperate keypad, and DS has a record of pin number and his own key.
Also my DM and I had a joint bank account for the last eight years of her life, it made it easier for me to do her shopping, and when she died, the account automatically transferred to me, saving lots of to-ing and fro-ing with the bank. The joint account was only practical because I'm an only child, multiple siblings would complicate it.