Hi Eala and Husband,
Welcome to the Forum
.
It's a little difficult to advise since you don't give much information about yourselves, so the advice has to be a bit general.
Assuming you intend to walk for a week and not wanting to be too strenuous, (approx 20 km per day), it puts your start point at about Triacastella, something like 120+ km from Santiago; if you want to obtain the 'Compostela' you have to walk at least 100km. I don't know about buses, etc but I imagine your best plan would be to get to Santiago and then get a bus to your start point.
You want to enjoy the scenery, but bear in mind that Galicia is not known as 'Green Spain' for nothing,
, even in June you can get cold, driving rain. I'm not expert on April weather, but don't be surprised if you miss some of the scenery because your head is down against the weather.
Then again you say you are fit, but I don't know what that relates to; fit for your ages, fit in regard to specific exercise, or fit in relation to walking with a pack for several days. To walk for a day with a small pack and return home in the evening is one thing; to repeat that walk, with a heavier pack, the next day and then for several more days is a different thing altogether.
I hope this doesn't sound negative - I want you to prepare well and enjoy
your pilgrimage, not struggle each day.
Enjoy your planning.
Buen Camino,
Brendan