I can escape bronze, but i havent tried to go further, i feel like im missing something.

so last season i attempted to escape bronze from bronze 4 placement, which i made my way into silver, but then i just stopped. idk why.

i feel like part of me isnt ready to progress much further, though i could maybe make it to gold. i aim to get as many towers down and engage team fights properly but i feel like my cs will hold me back later on because its complete garbage. i feel like alot of the time i only make 60-70 cs in the first 10 minutes. and i feel like in matches im not doing a whole lot to push objectives further. i mean what can i do to cs better and make sure these towers go down asap. i want to apply as much pressure as one person as i can in solo que to make sure we can have a better chance at winning.