There are a couple basic tricks, obviously deck type, card advantage, and gameplan change these but here are some of the rules:
Typically you want 9 player one turn one plays, and usualy ones that can contest globes. The exception to this is for slower decks that like to skip card advantage, but even those like at least 6 plus some subpar options that cant contest globes.
So you need to choose the weight of your curve either being low with a quick gameplan, ultra low with good card advantage, on curve so you can just play one or two things a turn and not need advantage, or a slower deck that has a little of both.
Next you need to have a general idea of how many turns it takes your deck to win under normal circumstances and you need to build with sort of the goal of having a couple cards in your hand on the turn you should be winning. This way you have a play and a replace. So you just sort of have to eyeball how many cards each turn your deck is going to play/generate.
Draw is never mandatory, there are other ways to generate card advantage, or make it irrelevant. Desolator is a perfect card advantage generator being the only thing you need in your hand, and stuff like fault/variax make card advantage unneeded since your hand barely matters once those hit.
An on curve deck looks something like 9 two drops, 3 three drops, 6 four drops, 6 five drops, 3 six drops, and a couple late game bombs. Then from there you have removal, tech, and usualy something to generate card advantage like some cycles, none of which really count towards the curve since their mana cost is sort of irrelevant just being cards you play at the opportune time and even if they are just a two cost card like punish they are just fine to be the only thing you play in a turn.
Another thing that takes a lot of practice is resource management, it is perfectly ok to not spend all your mana each turn, and even occasionally skip turns if your playing a deck with low card advantage. This is a tough skill to learn, but a valuable one because time spent drawing cards is lost tempo, and spending removal on a low priority threat that you could just trade with is a waste. This does of course depend on the deck your playing, many decks prefer to try and really use as much mana each turn.
I cant give you a lot of direct numbers because each deck is so different, its more of just something you sort of have to eyeball, test, and get a feel for. But if you look at my decks they should all give pretty good examples of the concepts I have been trying to convey.