Hi Lynne, Welcome to the forum!
You'll find all the answers to your questions on this forum - just use the search box in the top right hand corner. For example, here's a recent thread about travelling to St Jean
https://www.caminodesantiago.me/community/threads/arrive-in-madrid-or-paris.37860/#post-369136
And here's one about the average daily costs:
Daily costs https://www.caminodesantiago.me/community/threads/daily-budget.37741/#post-366984
There are all types of accommodation on the
Camino Frances, from albergues (hostels with dorms) to luxury hotels and everything else in between. Albergues are very cheap and they are a great way to meet people. Some of us enjoy having own room after a few nights in an albergue - many places have inexpensive pensions, or private albergues that have a few single/double rooms as well as the dorms. There are all types of washrooms too. Do you have a specific question/concern about that aspect?
April is a very nice to walk - you should have company when you need. You are likely to meet people on your first day of walking. If you stay in places like
Beilari in St Jean or at
Orisson you will meet a group of people that you're likely to see again and again.
Do you have a guidebook? Many people use the
John Brierley guide, but there are others too.
Buen Camino and enjoy the planning!
Nuala