So I need help in improving

I need help improving as I keep on gaining LP and instantly losing it at Silver V. _**And it doesn't help that my playstyle requires reliable teammates**_. Sadly this is hardly the case because I'm in this elo because I'm simply not good, therefore my teammates will be just like me: not good. How can I improve? If so, what skill should I focus on? I would massively appreciate a list of most important to least important skills to focus on to improve. Writing this right now I think I should work on communication as then I could link my decision making with my map awareness to help my team be more _reliable_. ...... What do you think?
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