I’m New at this as well..... put in 24 assorted trees last year, apples,plums,cherries,peaches and pears. First thing I did was get rid of the plastic wrap at the base of the trees and instead protected them with 1/4” hardwear mesh, up 18” or to the lowest branch. Keep the wire 4ish inches away from the trunks, you don’t want them rubbing! I’m not sure how tall your trees are coming if they are fairly short maybe leave that wrap on them (if they even have them...) until they get a little taller...... but from everything I’ve read the wrap will do more harm then good.....especially once they get older......
get a tensiometer this will tell you if your trees are thirsty or (drowning) from to much water, this is the type I have:
https://www.amazon.com/Irrometer-Model-SR-12-Inch/dp/B01607N5TY/ref=mp_s_a_1_7?adgrpid=56353031219&hvadid=274707183587&hvdev=m&hvlocphy=9002484&hvnetw=g&hvpos=1t2&hvqmt=e&hvrand=7599242891520007258&hvtargid=aud-648254335185%3Akwd-21739106&keywords=tensiometer&qid=1555367899&s=gateway&sr=8-7 pay attention to the length......
Sounds like these are all coming pruned down, which is a good thing and what you want, so the first year the trees will concentrate on making good roots... speaking of which if you can get away with it do not use any stakes or guy lines to keep the trees up. This again discourages root growth.....
You probably won’t have to prune anything this year, but next year during the dormant season (winter/early spring) just watch a bunch of YouTube videos you’ll get the hang of it!
Disclaimer: I’ve only had my orchard for one year, this is everything I remember researching last year, an “expert” I am not!