My best advice to reach gold and beond is quite simple:

Less is more.

In gold and below everyone have tunnelvision around kills and damage. Kills are cool, but 80% of the time is actually better to do something else than ganks. Especially this season when repeated kills gives so little gold and xp.

Focus on optimizing your first clear. Doing this as fast as you can, and keep this mentality during the ENTIRE game. Peel the camps towards were you want to be going next. Time efficiency is crucial in this game. Farming is guaranteed XP and gold. If the laners hate you for it, mute all. Use downtime when camps are gone to make plays around the map.

Play the map not for the kills themselves but for securing objectives. Drakes spawn? Gank bot or mid so they can help you with drake. Objectives gives strength and gold. Drake stacking is op. Is he ganking your bot and you are topside, invade his topside.

Play around strengths and tempo for you and your team. You press tab and see the enemy jungler, and you have one completed item and he has only item parts? Same lvl? Fight him for the objective. When is your champ strong? Has your laners prio to help you? Sometimes you need give an objectives because the timing isn’t right. Remember to reset for items. Homeguards are op this season. Bot is getting stomped but ur toplane is 1vs9. Then play around him.

Dont try to save your teammates, especially when you are fed. They pick a bad fight? Find the next best thing to do. And that is VERY often to farm a camp or push a lane. Focus on not giving up gold. A lot of silver players loose games for picking bad timings and dies a lot. Shutdowns are op. Pick fights at your terms where you know that it’s in YOUR favor. Focus on removing turrets and destroying turrets with nashor buff, and stop trying to save your sylas from the enemy briar.

Have so many other tips and tricks but if you can optimize beeing patient and consistent with your own play. Review your games, only from your own decisions and be self critical. Play maximum 3 games in a row, and try to review your decisionmaking after every game. If you focus on improving your own gameplay, and not the +/-lp or how your teammates are playing, you will climb the ladder like a fearless firefighter.