NL50 6max rush. 21/19 over 90 hands. No history/reads.

TL;DR lol... please do read though Pics at the end as a reward!

Can we approach this as a hand occurring at any ssnl stake? Also, I'm unsure exactly how much tighter people's ranges are at rush vs. regular. I usually just lump the two together and approach any hand as if I'm playing real poker. My regular stake is NL200; I'm approaching this hand as if it were vs. a solid 200 reg, but maybe I shouldn't be because it is in fact NL50 rush.

1) I've been out of practice lately and my hand reading has suffered. Are these bad runners for my hand?

2) Since it's 250bb+ deep my thinking is that he isn't necessarily fastplaying all of his 2pairs/sets/combo draws on the flop.
----- As an aside, do you think we should be c/c'ing some hands near the top of our range in his spot to limit variance/cut down on the PFR's equity (because of the stacksizes)?
----- Surely you agree we should, in his spot, c/c the flop with some of the stronger hands in our range at any stack size, yeah?
----- Do you think the stacksizes influence the likelihood he will be c/c'ing the flop with stronger hands?

3) With my actual hand, I like checking the turn for a few reasons...thoughts on that? However, I'd be barreling all of my hands that have lesser relative strength such as all of the combo type hands that are not JT/7T/flush.
----- Checking my strongest and betting my weaker may be exploitable, but it's unimportant at ssnl with no history ldo. The only thing I'm concerned about is if I'm losing too much value by checking turn.

4) I'm out of touch with the games prob, but I feel like I probably can't get 3 streets here....? I believe checking turn is the best play because it keeps in his weaker stuff that I can only get 2 streets from by checking turn.
-----Additionally, it limits my losses if I'm behind. Also, it keeps me from having to play higher variance guessing games vs a turn c/r at deep stacks (I've been playing a lot of live poker lately with deepstacks and like 4-5+ way pots, so I've gotten real PC'y) - I also realize PC'ing this turn is probably playing scared, and may in fact be a leak I've developed.
-----Further, on a cooler note, checking turn caps my range, and if he's watched vids, read 2+2, or played higher then he may know this and checking turn allows me to pick off river bluff c/r's.... This last part goes against me trying to take a lower variance line though... I obviously shouldn't be checking turn to induce river c/r bluffs at 200 or below.. that's for later at 400+.. or at least after I have a lot of history with someone.

5) So are those runners bad for me in terms of him actually having a better hand?

6) Once I check turn, a river raise vs his lead is out of the question vs. a reg right?

Thanks for taking the time to read through that.