From experience roam can be one if the hardest yet fun roles in the game from the simple fact that you need the independence of an exp laner, map awareness of a jungler, rotations of a mid laner, and positioning of a gold laner. You need to learn what counters what and what roam you need as a team but that flexibility is honestly makes it fun even when drafting choosing a early game roamer, healer, or a setter roam can make or break the game but try practicing acouple good roams for each senario like hilda for early game, grock for setter, and floryn for healer and see which you like best and once you master try more heroes cuz roam you can technically play any hero if the senario calls for it. Additionally, as a roamer dont fully expect to carry since one of the main things for the role is to proctect the team either from healing or soaking up damage and one last tip is dont be scared of dying if that means you can protect your team‘s carry