The most important part of carp fishing, or any fishing really, you need to be where the fish are. Finding the fish and fishing for them where they are is always key.
You also need to think about presentation, are your rigs effective or not? What’s the bottom like? no point fishing a bottom bait in dense weed.
baiting approach - smashing a spod over fish that move off the noise is pointless. Maybe a catapult or throwing stick to introduce bait. Some waters they will be attracted to a spomb, others it’s the kiss of death and they’ll not come back.
How much bait you use, unless the fish are really having it off feeding id always start off with a little. You can’t take out what you’ve put in as the saying goes. This needs to be based around stock levels and other species too.
Venue choice, chose somewhere with high stocking levels so you have a chance of catching more regularly as you’ll be able to learn quicker all aspects of carp fishing.