These buzzes could be because the action is a bit low, but there could be a whole lot of other reasons, too, such as a raised, or lowered, fret, a bit too much or too little 'bow' in the neck, imprecise finger placing... I could go on. The real solution would be to consult a competent guitar tech, or experienced guitar tutor, and find the real cause that needs addressing. Still, as you mention, it can't do too much harm to 'have a go' yourself, as long as you've a back-up plan if things get out of hand. Yes, the string height is set, all other things being equal, by the screws at each end of the bridge holding the intonation adjusters. A good-quality flat-bladed screwdriver is required, to be a good fit in the screw slots. Turning clockwise will raise the bridge; I would suggest only very slight adjustment at a time, of maybe a quarter-turn at each end. This will affect the guitar's tuning, so it will need careful bringing back to pitch before playing it again, to see if there's any improvement. Go easy on doing this; these screws are not used to being turned, and are subject to the tension from the strings. Don't force anything. Use your engineering 'feeling' to judge whether it's doable or not. If it's successful, and your buzzing issues solved, 'well done'; if not, put the screws back to their original position as best you can, and get help. No, it's not rocket surgery, and most competent folk would gladly show you how to check this, and other potential issues, whilst they sort it out. You're unlikely to break anything if you're careful, but be gentle with screwdriver blades, as it's easy to slip and take a chunk out of the guitar's finish, or your own hand. In any case, a good set-up for any guitar is a worthwhile investment; the basics can be done by oneself, once they've been mastered with an experienced guide. Hope this helps.
Douglas