Hi starwonder54 and welcome!
You were feeling a bit overwhelmed by the thought of the hike from SJPP to Roncesvalles. Now you might be feeling a bit overwhelmed by this thread... I am!
Just a few hopefully reassuring points from me -
1 you've not mentioned your health/fitness. This is more important than your age (which we might hazard to guess from the '54 in your handle..?). If you are not very fit, but able to work on your fitness and do regular walks (eventually with a pack) - and you have plenty of time to get into that - it will really help and increase confidence. It's important to not think of Roncesvalles as the end-goal, because the very next morning you will have to 'go-again' and again and again, so stamina and mental resolve are equally important.
2 get your pack/weight sorted out as much as you can. FIrst timers tend to carry too much, so have a look at the multitiude of threads on this (also a bit overwhelming!)
3 everyone has a view of the status/challenge of this stage - try and assess the capabilities of the teller, as, in the exhilaration of it all some folks get a bit carried away with their descriptions of their adventures
4 go nice and easy on the climb up to Orisson. This is the steepest part and if you take it gently you'll have plenty left for the longer but milder stretch thereafter. It's actually not a long stage, and there'll be plenty of daylight in May - time is on your side and while others may whiz past you to make sure they secure a bed at Roncesvalles, you don't have that issue.
5 on the one hand, note that thousands of people of all descriptions walk this stage every (normal) year, so be reassured by that. But at the same time don't be lulled into a false sense of security. Make sure you check in at the volunteers' office in SJPP and hear their weather report and take their advice if they recommend going via the lower route.
From a distance it can sound daunting, but with a little bit of prep (depending of course on your capabilities) it should be fine and hugely memorable.