if you can get there then go for it
Gold on your first ranked season isn't too bad
honestly just do the best you can given what knowledge you have
you could always make a post over in the recruitment forum saying your looking for some players to practice with in custom games in your skill bracket (high silver-low plat)
the first thing I would recommend is learn what champions give you problems in your lane with whatever champion(s) you play
this will be your biggest block. as a prime example, when I mid lane I always have issues against Fizz. There is no champion or playstyle I can run to counter him easily, so I have just gone for the hard ban.
finding what counters your champion is a key step. if you can learn to fight that champion, be either a build tweak or playstyle tweak; then great. but if you can't then you know, that should be one of your priority bans for the champion you might play
after that would be build optimization. just because the build you've been using works doesn't mean there isn't a better one. always keep other items in the back of your head as switch outs depending on enemy team comp and their respective builds
if you see an enemy is building hp regen or has in built hp regen, even if you wont run into til late game, consider getting something with Grievous Wounds as your 3rd or 4th item
someone is building heavy tank? then make sure to grab extra pen to help shred that defense away.
