Questions from a New-ish player

Hi everyone, I'm relatively new here. I was wondering if anyone could offer some general advice on how to generally improve my gaming experience with champs like Jinx and Soraka.

I've read a few guides on both champs, experimented with their roles and even attempted going "outside the box" with playing them and always tend to have mixed results (more bad than good).

Now, I know that I have read a great deal of mockery with people wanting to do a build focusing on champs like jinx doing jungle roles, but out of curiosity, and bias aside, or statements like "the best way is to not do it." Can anyone help me with understanding fundamentals on building up for something like that?

In my normal games, I have an item set I generally try to run (legitimate ADC, non jungle antics), and due to my inexperience, I never know what items to build in any "best sequence". Any suggestions would be greatly appreciated. I am aware that Jinx generally enjoys running items like Infinity Edge, or Runaan's Hurricane, but I still find myself confused with the order of my item builds and would like to know how to improve that, or how to properly focus on prioritizing.

As for Soraka, I seem to have a decent build, but my question is more along the lines of, what is generally the most effective skill leveling order? I typically go for my CC, then Heal, and finally my standard Damage/Self-Heal and aim to master my CC first. Am I doing this right, or should I be doing something different?

Anyways, thanks everyone, I do appreciate any advice, and apologize if this is long-winded, or seems a bit "dumb".

Ravvynfall Out!