I've got mine on medium settings mostly out of concern about how horribly optimized a lot of games like this are. Haven't had any trouble spotting people, just having trouble, you know, shooting them. Been a while since I've played any shooters, still having some awkward twitchy movements throwing off my aim. Had a good scav run though, in woods. Spawned by RUAC roadblock, went up to that UN camp and found a wiped squad. They were obviously picked over for the really good stuff but found a nice camelbak, won't be using it in raids I don't think but it's a big help for my stash situation. Got it holding all my magazines, gonna use another to store medical supplies, or maybe using them to carry bigger more awkward items would be better, I dunno.
Getting better at the overall way the game works though, mostly been playing woods and getting a good enough feel for the map I can usually find my way to important areas. If you're new and not insuring everything, uh, insure everything. It seems counterintuitive but insurance is really good on shitty gear. Nobody's gonna steal your bankrobber rig, or your unmodded SKS, so you're almost guaranteed to get it back. Plus if you manage to kill a player or find a wipeout like I did, insurance doesn't actually care if you died or not. If you find an M4A1 and drop your insured SKS for it, as long as nobody leaves the map with it you'll get it back.
Was clued in to a good routine for leveling up and getting used to the game. SKS, PACA, bankrobber, sling pack, then toss some random meds and 3000 roubles in your secure container. Insure everything, then go to woods or interchange and just stay around the outskirts and check hidden stashes (youtube has all the locations), then use the 3000 roubles to dip via the bridge extract. Your gear's cheap as shit so nobody's gonna steal it and you'll get it back from insurance, and even if somebody does take it it's cheap as shit so you can just buy more.