You'll want to start by finding an attorney that specializes in personal injury claims. You can then hire that attorney to represent you in court. Your attorney will ask the judge for a settlement, typically between 30-50% of what you are owed, depending on the severity of your injuries.
These difficulties make it hard to focus on getting the compensation you deserve by filing a potential case against the truck driver, their trucking company, and the insurance company. It's common for large commercial truck crashes to have multiple issues that require thorough investigation and swift action to ensure that all possible evidence is obtained before the truck involved is repaired or written off.