If you're under 25 the Austrian alpine Club (Brittania Section) offer alpine courses at a huge discount. My daughter did the Glacier 1 course and had a fun week, with a 50% discount. https://aacuk.org.uk/
Glacier travel is a key skill as previously stated.
Routes at PD level require little actual climbing or abseils for that matter and can often be a snow plod. AD can be varied requiring abseils and short climbing sections (3 - 4m) at about VDiff. e.g the Cosmiques Arrete AD in Chamonix has a long abseil (which can be avoided) and the crux is a nasty 4m scrabble (VS HVS?) up a flat wall with diagonal crack. The rest is just a scramble on mixed snow and rock and easy short climbs.
Most popular alpine routes have bolted belay and abseil points pre set up by guides wanting to hurry clients along.
There are objective dangers that you have no control over no matter how skilled; rock fall, avalanche, hidden crevasses, so there's a certain amount of randomness.
Being fit and skinny are also a must. Days are long, often with less oxygen, packs potentially heavy. A 1500m climb is pretty normal.