Hard Pruning Backyard Fruit Trees: missed 1st+2nd year

Greetings to this honorable clan of wise plant people,

Here's my dilemma:
I planted 5 bare root stone fruit trees last January 2021 and did not hard prune them at planting nor did I prune them during this most recent dormant season (I'm in zone 10b, but break started about 2 weeks ago).  Having now poured over quite a bit of technique and science, I feel more confident to embark on pruning henceforth, but I'm worried that I missed these critical pruning windows-- "at planting" and "year two".  (I blame my own ignorance, intimidation and having my first baby.)

I know that there is the option of just letting trees run wild, but in this small backyard setting I had hoped to maintain them fairly tight and as productive as possible.

My question is this: can I conduct that dramatic hard prune of the central leader NEXT dormant season (would be year 3, this coming winter) as if it were year one and then proceed accordingly with summer pruning without severely damaging/ stunting the trees?  They are only just now about 1 inch in diameter and fairly sparsely branched.

And furthermore, should I do some heading and thinning cuts this summer, knowing that I might end up cutting much of that growth off the following season anyway?

Also, buds just recently broke but some branches have not yet blossomed-- I assume it would be foolish to start hacking away at them now?  But also don't want them "wasting their energy" flowering and fruiting if I'm just going to remove so much so soon?

Wish I'd gotten my act together with these a few months ago! (The last 2 seasons I've been totally wrapped up in re-landscaping our front yard with CA natives and had sort of left these guys on the back burner.)

A little background:
I have been working to transform a humble suburban yard in Southern California (zone 10b) into a little oasis.  Heavy clay soil, South facing backyard but lots of mature trees around and a tall wall on the southern end creating some challenging shade zones.  I sheet mulched patches of lawn a few years ago before planting to create "island beds" keep some turf between as paths.  Mulching mulching mulching with compost.  Growing comfrey from root cuttings (struggling), artichoke, clover, yarrow, catmint, alyssium under the fruit trees with plenty of endemic oxalis popping up pretty sourgrass yellow flowers in spring.  No fertilizers added at planting but just applied a small dose of "back to earth" fruit tree fertilizer about a month ago.  Trees seem healthy to my eye if a little spindly.


Any guidance on reviving my nearly-neglected little trees would be much appreciated!!

It is hard for me to answer this because my goal is so different.  I want a canopy tree that is deer resistant so with lower limbs at 6 foot height.   My experience is that trees that had the leader cut back formed Y shaped branching which leads to branches breaking off especial with peaches that have large fruit. The  earlier pruning begins the more lifetime pruning will be needed, so with 5 acres, I  want trees to develop according to their genetic potential and independent as possible.