Lesson 1:
kffs are awesome, well done.
Lesson 2: klaw+pole with a nob in a mob. You can not afford to run away and you need to be able to deal with armour, mech,
meq and probably most deadly a dread.
I think it about lesson 5: spam things, balanced lists for the other codices not the orks.
1 trukk will not last long, several trukks however will make enough of an impact.
20 foot slogging orks isn't scary but 90 odd are.
Also zzap guns are really not great. Kannons are good though.
You need make sure you bring a good number of rockets to deal with mech.
I appreciate you want variety to test units but instead make a variety of lists.
Good luck and welcome to orks