it's really hard to help you here as the question is extremely general, I could tell you what I look at when I'm analysing hands I've played, but we play totally different stakes and game so would be mmore harm than good.
What you're doing right now is you're building your own "personality" as a poker player, this starts (generally) with a solid core fundamental game followed by loads of stylistic adaptations designed to suit your style specifically, it's extremely difficult for me to say "should look at X river stat, or Y turn range" etc because I really don't have enough understanding of your general approach.
Wat I would suggest as you get used to this stuff is to play around with the filters on your HEM reports section, filter the different positions, in 3bet pots, calling 3bets, unopened pots etc any situation you can think off and look at the results, see if any of them are massively down then look at the reasons WHY you might be losing there, a lot of the time most of these results will be down to external influence but if there is a big leak you'll spot it this way.
i completely get where you're coming from but tbh still think im 'back' in the stages where generic
"you should be winning in 3bt pots with initiative"
"you should be losing 1bb/100 from bb - thats a good thing"
"you should be winning in pots where you bet 3 times..."
kinda logic/ statements apply.
That's why patricks first one of - river action is XC, whats ur numbers john? and I find I'm -15bi's over x hands. I thought that was 'ok' but he said to me, not really it should be much closer to $0 or winning... its a tiny thin but now I'm not going to look at river XC decisions the same - I hope.